The Collaborative International Dictionary of English v.0.48:

Blob \Blob\ (bl[o^]b), n. [See Bleb.]
   1. Something blunt and round; a small drop or lump of
      something viscid or thick; a drop; a bubble; a blister.
      --Wright.
      [1913 Webster]

   2. (Zool.) A small fresh-water fish (Uranidea Richardsoni);
      the miller's thumb.
      [1913 Webster]

The Free On-line Dictionary of Computing (17 December 2009):

BLOB

   1. binary large object.

   2.  blitter object.

   [Jargon File]


The Jargon File (version 4.4.7, 29 Dec 2003):

BLOB


    1. n. [acronym: Binary Large OBject] Used by database people to refer to
    any random large block of bits that needs to be stored in a database, such
    as a picture or sound file. The essential point about a BLOB is that it's
    an object that cannot be interpreted within the database itself.

    2. v. To mailbomb someone by sending a BLOB to him/her; esp. used as a
    mild threat. ?If that program crashes again, I'm going to BLOB the core
    dump to you.?


V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006):

BLOB
       Binary Large OBject


Moby Thesaurus II by Grady Ward, 1.0:

94 Moby Thesaurus words for "blob":
   ball, balloon, bilge, bit, bladder, blain, bleb, blister, boll,
   bolus, boss, bow, bubble, bulb, bulbil, bulblet, bulge, bulla,
   bump, bunch, burl, button, cahot, chine, clump, condyle, convex,
   dab, dowel, drop, droplet, ear, ellipsoid, flange, flap, gall,
   geoid, globe, globelet, globoid, globule, glomerulus, gnarl, gob,
   gobbet, gout, handle, hill, hump, hunch, jog, joggle, knob, knot,
   knur, knurl, lip, loop, lump, mole, mountain, nevus, nub, nubbin,
   nubble, oblate spheroid, orb, orbit, orblet, papilloma, peg,
   pellet, prolate spheroid, rib, ridge, ring, rondure, shoulder,
   smidgen, smidgin, sphere, spheroid, spherule, spine, stud, style,
   tab, tubercle, tubercule, verruca, vesicle, wale, wart, welt