Feelings getting caught, it's off, I'm pissing

from Tyler The Creator – Domo 23 Lyrics on Rap Genius

Meaning

Tyler grabbed Lucas and filmed them kissing (heard in the previous line), to prove that he’s not racist or homophobic. But while they were kissing, Tyler’s started to feel something, so he stopped.
“It’s off, he’s pissing” — He’s catching people off guard and pissing them off by proving them wrong.

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