The Collaborative International Dictionary of English v.0.48:

Daub \Daub\ (d[add]b), v. t. [imp. & p. p. Daubed; p. pr. &
   vb. n. Daubing.] [OE. dauben to smear, OF. dauber to
   plaster, fr. L. dealbare to whitewash, plaster; de- + albare
   to whiten, fr. albus white, perh. also confused with W. dwb
   plaster, dwbio to plaster, Ir. & OGael. dob plaster. See
   Alb, and cf. Dealbate.]
   1. To smear with soft, adhesive matter, as pitch, slime, mud,
      etc.; to plaster; to bedaub; to besmear.
      [1913 Webster]

            She took for him an ark of bulrushes, and daubed it
            with slime and with pitch.            --Ex. ii. 3.
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   2. To paint in a coarse or unskillful manner.
      [1913 Webster]

            If a picture is daubed with many bright and glaring
            colors, the vulgar admire it is an excellent piece.
                                                  --I. Watts.
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            A lame, imperfect piece, rudely daubed over.
                                                  --Dryden.
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   3. To cover with a specious or deceitful exterior; to
      disguise; to conceal.
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            So smooth he daubed his vice with show of virtue.
                                                  --Shak.
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   4. To flatter excessively or glossy. [R.]
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            I can safely say, however, that, without any daubing
            at all,
            I am very sincerely your very affectionate, humble
            servant.                              --Smollett.
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   5. To put on without taste; to deck gaudily. [R.]
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            Let him be daubed with lace.          --Dryden.
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The Collaborative International Dictionary of English v.0.48:

Daub \Daub\ (d[add]b), v. i.
   To smear; to play the flatterer.
   [1913 Webster]

         His conscience . . . will not daub nor flatter.
                                                  --South.
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The Collaborative International Dictionary of English v.0.48:

Daub \Daub\, n.
   1. A viscous, sticky application; a spot smeared or daubed; a
      smear.
      [1913 Webster]

   2. (Paint.) A picture coarsely executed.
      [1913 Webster]

            Did you . . . take a look at the grand picture? . .
            . 'T is a melancholy daub, my lord.   --Sterne.
      [1913 Webster]

WordNet (r) 3.0 (2006):

daub
    n 1: material used to daub walls
    2: a blemish made by dirt; "he had a smudge on his cheek" [syn:
       smudge, spot, blot, daub, smear, smirch, slur]
    3: an unskillful painting
    v 1: coat with plaster; "daub the wall" [syn: plaster, daub]
    2: apply to a surface; "daub paint onto the wall"
    3: cover (a surface) by smearing (a substance) over it; "smear
       the wall with paint"; "daub the ceiling with plaster" [syn:
       daub, smear]

Moby Thesaurus II by Grady Ward, 1.0:

199 Moby Thesaurus words for "daub":
   abstract, abstraction, altarpiece, anamorphosis, anoint,
   apply paint, attaint, bad likeness, bedaub, bedizen, beeswax,
   begild, besmear, besmirch, besmoke, besmutch, besoil, bestain,
   black, blacken, block print, bloodstain, blot, blotch, blur, botch,
   brand, brush on paint, burlesque, butter, calcimine, caricature,
   cartoon, chalk, charcoal, coat, collage, color, color print,
   complexion, copy, cover, crayon, crosshatch, cyclorama, dab,
   dapple, darken, dash off, deep-dye, delineate, depict, design,
   diagram, dip, diptych, dirty, discolor, distemper, distortion,
   doodle, double-dye, draft, draw, dress, dye, emblazon, embrocate,
   enamel, engild, engraving, eyesore, face, fast-dye, fleck, flick,
   flyspeck, fresco, gild, glaze, gloss, glycerolate, grain, grease,
   grease the wheels, hatch, hue, icon, illuminate, illumination,
   illustration, image, imbue, ingrain, japan, lacquer, lard, lay on,
   lay on color, likeness, limn, lubricate, macula, maculation,
   macule, mark, miniature, misdraw, mispaint, montage, mosaic, mural,
   oil, paint, paint a picture, panorama, parget, parody, patch,
   pencil, photograph, picture, picturize, pigment, plaster, pomade,
   portray, prime, print, representation, reproduction, salve, scorch,
   scratch, scribble, scumble, sear, shade, shadow, shellac, singe,
   sketch, slap on, slather, slick, slick on, slop on paint, slubber,
   slur, smarm, smear, smear on, smirch, smoke, smooth the way,
   smouch, smudge, smut, smutch, soap the ways, soil, spatter, speck,
   speckle, splash, splatter, splotch, spot, spread on, spread with,
   stain, stained glass window, stencil, stigma, stigmatize,
   still life, stipple, sully, tableau, taint, tapestry, tar, tarnish,
   tinct, tincture, tinge, tint, tone, trace, travesty, triptych,
   undercoat, unguent, variegate, varnish, wall painting, wash, wax,
   whitewash