\Slump\, v. i.
1. To slide or slip on a declivity, so that the motion is
   perceptible; -- said of masses of earth or rock.
2. To undergo a slump, or sudden decline or falling off; as,
   the stock slumped ten points. [Colloq.]

\Slump\, n.
A falling or declining, esp. suddenly and markedly; a falling
off; as, a slump in trade, in prices, etc. [Colloq.]

\Slump\, n. [Cf. D. slomp a mass, heap, Dan. slump a
quantity, and E. slump, v.t.]
The gross amount; the mass; the lump. [Scot.]

\Slump\, v. t. [Cf. {Lump}; also Sw. slumpa to bargain for
the lump.]
To lump; to throw into a mess.
      These different groups . . . are exclusively slumped
      together under that sense.               --Sir W.
                                               Hamilton.

\Slump\, v. i. [imp. & p. p. {Slumped}; p. pr. & vb. n.
{Slumping}.] [Scot. slump a dull noise produced by something
falling into a hole, a marsh, a swamp.]
To fall or sink suddenly through or in, when walking on a
surface, as on thawing snow or ice, partly frozen ground, a
bog, etc., not strong enough to bear the person.
      The latter walk on a bottomless quag, into which
      unawares they may slump.                 --Barrow.

\Slump\, n.
1. A boggy place. [Prov. Eng. & Scot.]
2. The noise made by anything falling into a hole, or into a
   soft, miry place. [Scot.]