The Collaborative International Dictionary of English v.0.48:

Slushy \Slush"y\ (sl[u^]sh"[y^]), a.
   Abounding in slush; characterized by soft mud or half-melted
   snow; as, the streets are slushy; the snow is slushy. "A
   dark, drizzling, slushy day." --Blackw. Mag.
   [1913 Webster]

WordNet (r) 3.0 (2006):

slushy
    adj 1: being or resembling melting snow; "slushy snow"; "deep
           slushy mud"
    2: effusively or insincerely emotional; "a bathetic novel";
       "maudlin expressions of sympathy"; "mushy effusiveness"; "a
       schmaltzy song"; "sentimental soap operas"; "slushy poetry"
       [syn: bathetic, drippy, hokey, maudlin, mawkish,
       kitschy, mushy, schmaltzy, schmalzy, sentimental,
       soppy, soupy, slushy]

Moby Thesaurus II by Grady Ward, 1.0:

111 Moby Thesaurus words for "slushy":
   Siberian, algid, arctic, barfy, bathetic, below zero, biting,
   bitter, bitterly cold, bleak, boreal, brisk, brumal, cold,
   cold as charity, cold as death, cold as ice, cold as marble,
   crappy, crisp, cutting, dirty, disgusting, fecal, feculent, fetid,
   filthy, flyblown, foul, freezing, freezing cold, frigid, gelid,
   glacial, gloppy, gunky, hibernal, hiemal, hyperborean, ice-cold,
   ice-encrusted, icelike, icky, icy, inclement, keen, maggoty,
   malodorous, maudlin, mawkish, mephitic, miry, mucky, muddy, mushy,
   nasty, nauseating, nipping, nippy, numbing, odious, oozy, ordurous,
   penetrating, piercing, pinching, plashy, puky, putrid, rank, raw,
   repulsive, rigorous, romantic, rotten, scabby, scummy, scurfy,
   severe, sharp, shitty, slabby, sleety, slimy, slobby, sloppy,
   sloshy, sloughy, sludgy, snappy, soft, soppy, splashy, sposhy,
   squashy, squelchy, squishy, sticky, stone-cold, subzero,
   supercooled, tear-jerking, turbid, vile, vomity, winterbound,
   winterlike, wintery, wintry, wormy, yecchy