The Collaborative International Dictionary of English v.0.48:

Blubber \Blub"ber\, n. [See Blobber, Blob, Bleb.]
   [1913 Webster]
   1. A bubble.
      [1913 Webster]

            At his mouth a blubber stood of foam. --Henryson.
      [1913 Webster]

   2. The fat of whales and other large sea animals from which
      oil is obtained. It lies immediately under the skin and
      over the muscular flesh.
      [1913 Webster]

   3. (Zool.) A large sea nettle or medusa.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Blubber \Blub"ber\, v. i. [imp. & p. p. Blubbered; p. pr. &
   vb. n. Blubbering.]
   To weep noisily, or so as to disfigure the face; to cry in a
   childish manner.
   [1913 Webster]

         She wept, she blubbered, and she tore her hair.
                                                  --Swift.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Blubber \Blub"ber\, v. t.
   1. To swell or disfigure (the face) with weeping; to wet with
      tears.
      [1913 Webster]

            Dear Cloe, how blubbered is that pretty face!
                                                  --Prior.
      [1913 Webster]

   2. To give vent to (tears) or utter (broken words or cries);
      -- with forth or out.
      [1913 Webster]

WordNet (r) 3.0 (2006):

blubber
    n 1: an insulating layer of fat under the skin of whales and
         other large marine mammals; used as a source of oil
    2: excess bodily weight; "she disliked fatness in herself as
       well as in others" [syn: fatness, fat, blubber,
       avoirdupois] [ant: leanness, spareness, thinness]
    v 1: cry or whine with snuffling; "Stop snivelling--you got
         yourself into this mess!" [syn: snivel, sniffle,
         blubber, blub, snuffle]
    2: utter while crying [syn: blubber, blubber out]

Moby Thesaurus II by Grady Ward, 1.0:

121 Moby Thesaurus words for "blubber":
   bark, bawl, bellow, blare, blat, boil, boil over, boohoo, boom,
   bray, break down, breathe, breeze, bubble, bubble over, bubble up,
   burble, burst into tears, butter, buzz, cackle, chant, chirp, clay,
   coo, crow, cry, cushion, dissolve in tears, dough, down, drawl,
   drone, drop a tear, effervesce, eiderdown, exclaim, feather bed,
   feathers, ferment, fizz, fizzle, fleece, floss, flue, fluff, flute,
   foam, gabble, gasp, gibber, greet, growl, grunt, guggle, gurgle,
   hiss, jabber, kapok, keen, lilt, maunder, mouth, mumble, murmur,
   mutter, pant, pillow, pipe, plop, plush, pudding, puff, putty,
   roar, rubber, rumble, satin, scream, screech, seethe, shed tears,
   shriek, sibilate, sigh, silk, simmer, sing, snap, snarl, snivel,
   snort, sob, sparkle, speak incoherently, splutter, sputter, squall,
   squawk, squeal, susurrate, swansdown, thistledown, thunder,
   trumpet, twang, velvet, wail, warble, wax, weep, whimper, whine,
   whisper, wool, work, yap, yawp, yell, yelp, zephyr