When somebody says 'I'm in my feels' it means that they're so distracted with either their feelings, emotions or reality at all, that they do not want to communicate
Friend A: ''Hey dude, what's wrong?''
Friend B: ''Don't talk to me right now, I'm in my feels''
When you're crushing on somebody that'll never like you back and it's making you upset. When you're in your feelings you will probably listen to sad/ love music and cry. They will also probably want to be alone.
Tilly: Hey Alisha! do you want to go to the pool?
Alisha: No thanks, I'm In my feelings right now.
Tilly: Oh don't worry about it :)
When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).