Real Dictionary

thump
verb: If you thump something, you hit it hard, usually with your fist.

thump in American English
a blow with something heavy and blunt, as with a cudgel
to hit or fall with a thump
to strike with a thump or thumps
intransitive verb: to strike, beat, or fall heavily, with a dull sound
noun: a blow with something thick and heavy, producing a dull sound; a heavy knock
transitive verb: to strike or beat with something thick and heavy, so as to produce a dull sound; pound

thump in British English
noun: the sound of a heavy solid body hitting or pounding a comparatively soft surface
verb: to strike or beat heavily; pound