A blow that produces a muffled sound.

The sound of such a blow; a thud.

Used to replace the vulgar or blasphemous element in "what the hell" and similar phrases.

“Where the thump have you been?!”

To hit (someone or something) as if to make a thump.

To cause to make a thumping sound.

“The cat thumped its tail in irritation.”

To thud or pound.