surname, attested from late 12c., probably meaning bald head; cf. Wyclif Stye up, ballard, where Coverdale translates Come vp here thou balde heade [2 Kg.2:23-24, where God kills 42 children for making fun of Elijah's lack of hair.]
A slump is a form of mass wasting that occurs when a coherent mass of loosely consolidated materials or rock layers moves a short distance down a slope. Movement is characterized by sliding along a concave-upward or planar surface. Comments.
verb. The definition of a slump is a sudden decline, or is a long period of decline and loss. When stock market quotes are down for a long period of time, this is an example of a market slump. To slump is to experience a sudden decline or to slouch over.o slide down or spread out thickly, as mud or fresh concrete. noun. 1  The act or an instance of slumping. 2  A drooping or slouching posture: read defeat in the slump of his shoulders. 3  A sudden falling off or decline, as in activity, prices, or business: a stock market slump; a slump in farm prices.