Definitions from Wiktionary ( )

▸ verb:  (intransitive) To collapse heavily or helplessly.
▸ verb:  (intransitive) To decline or fall off in activity or performance.
▸ verb:  (intransitive) To slouch or droop.
▸ verb:  (transitive) To lump; to throw together messily.
▸ verb:  To fall or sink suddenly through or in, when walking on a surface, as on thawing snow or ice, a bog, etc.
▸ verb:  (transitive, slang) To cause to collapse; to hit hard; to render unconscious; to kill.
▸ noun:  A heavy or helpless collapse; a slouching or drooping posture; a period of poor activity or performance, especially an extended period.
▸ noun:  (slang by extension) A period when a person goes without the expected amount of sex or dating.
▸ noun:  A measure of the fluidity of freshly mixed concrete, based on how much the concrete formed in a standard slump cone sags when the cone is removed.
▸ noun:  (geology) A form of mass wasting in which a coherent mass of loosely consolidated materials or a rock layer moves a short distance down a slope.
▸ noun:  (geology, loosely) A crater or depression (an area where the ground slumps) which forms as a result of such wasting. (A large crater is colloquially called a megaslump.)
▸ noun:  (UK, dialect) A boggy place.
▸ noun:  (Scotland) The noise made by anything falling into a hole, or into a soft, miry place.
▸ noun:  (Scotland) The gross amount; the mass; the lump.
▸ noun:  A cobbler-like dessert cooked on a stove.

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