thumper

noun

1. a blow with something heavy and blunt, as with a cudgel
2. the dull sound made by such a blow

transitive verb

1. to strike with a thump or thumps
2. 1. to thrash; beat severely
   2. to defeat decisively

intransitive verb

1. to hit or fall with a thump
2. to make a dull, heavy sound; pound; throb