— thumper , n.
/thump/ , n.
1. a blow with something thick and heavy, producing a dull sound; a heavy knock.
2. the sound made by or as if by such a blow.
v.t.
3. to strike or beat with something thick and heavy, so as to produce a dull sound; pound.
4. (of an object) to strike against (something) heavily and noisily.
5. Informal. to thrash severely.
v.i.
6. to strike, beat, or fall heavily, with a dull sound.
7. to walk with heavy steps; pound.
8. to palpitate or beat violently, as the heart.
[ 1530-40; imit. ]