The word "thump" can have several meanings depending on its context.
1) It could refer to a loud, sharp sound made by hitting something with force or impact - for example, when you hit something hard it might make a thumping noise.
2) Thump can also be used as an interjection to express surprise or excitement- for instance, if someone does something unexpectedly well, you could say "Wow! You really thumped that!"
3) In some regions of the United States and England, it is a verb meaning to strike forcefully with one's fist. For example: "I had to thump him for being so rude."