When a gay male puts his testicles into a another gay male's anus and deliberately attempts to catch HIV; or, when a gay male puts his entire mouth, teeth and all, into the anus, to eat out the HIV.

to cumble someone
to destroy their intentions

To block or prevent from happening...or, when used in slang, to destroy someone or something out of anger.

squirrel

Opposing force mechanism that is encountered as kinetic friction when any mechanism operates/pushes forward through existence in the universe.

to sneeze and the fart at the same time.

A mixture of two words, 'twat' and 'what'. Made up by lil john and his eastside boiz homies.

Thwarting is the act of waving around your boobies. Even though it concerns another part of the body, it is very similar to twerking, and as such mostly practiced by females. However, some exceptions to this rule exist.
In this matter unthwarting is also relevant.