Green’s Dictionary of Slang

1. (US black gang/campus) to make an error, to blunder.

1988		Eble Campus Sl. Oct. 10: trip – to act silly or stupid; ask outrageous or dumb questions.
1991		L. Bing Do or Die (1992) 86: I leave a damn trail of blood all the way into that place, and they tell me to have a seat? Man, they tripped bad.
1997–2001		Online Sl. Dict. 🌐 trip v [...] 4. to not be thinking clearly, to err. (‘You were right about her phone number. I must have been tripping.’).

2. (US) to lie.

1993

Lerner et al. Dict. of Today’s Words 184: Trip – to lie, as in, ‘Are you tripping me about that?’.