slump

As verbs the difference between slump and sluff

is that slump is to collapse heavily or helplessly while sluff is an alternative spelling of lang=en to shed or to slide off.

As nouns the difference between slump and sluff

is that slump is a heavy or helpless collapse; a slouching or drooping posture; a period of poor activity or performance, especially an extended period while sluff is an alternative spelling of lang=en skin shed by a snake or other reptile.

As an acronym SLUFF is

short Little Ugly Fat Fellow (or Fucker); US Airforce nickname for the A-7 bomber.

As nouns the difference between slump and minislump

is that slump is a heavy or helpless collapse; a slouching or drooping posture; a period of poor activity or performance, especially an extended period while minislump is a brief slump in performance.

As a verb slump

is (lb) to collapse heavily or helplessly.