1) ain't = is/am/are not
ain't not -- no meaning
2) what is up = What is happening?
3) get da hell out of here -- I command you to leave
4) higenic = hygienic
would you clarify my doubt by explaining
1) aint/ aint not
2) what is up
3) get da hell out of here
Thanks in advance.
These are English, but not Standard or formal English:
1) ain' t / ain't not
ain't not is emphatic. Doubling not (ain't not) markes the expression with more emphasis.
This is another way of asking either how are you? or what's going on?
2) What is up?
This has two meanings. It's used as an expression of disbelief, as in I can't believe it or I don't believe it. It also means, go away from this place, now!
3) Get da hell out of here.
da is a phonetic spelling of the.
This is a non-Standard spelling variant for hygienic. That is, people will write it, but you won't find it in the dictionary.