Fuck

By far the most versatile and flexible word in the English language, with endless meanings and interpretations, while capable of being used in all/any parts of speech (noun, verb, adjective, pro-noun, etc).

You can use it how ever the fuck you so please and the whole entire sentence will still make fucking sense.

1. (verb) lets fuck.
2. (noun) that dumb fuck over there.
3. (adjective) she ugly as fuck.
4. what the fuck?
5. we're fucked...
6. who knows where the fuck they went
7. shut the fuck up
8. are you fucking serious?
etc...

Duck

Can be used instead of avoid. To duck someone/somethings means to stay away from; steer clear of.

"Yo, stop ducking me"

person 1: "you going to work today"
person 2: "i'm on the schedule but i'm tryna duck that"