Green’s Dictionary of Slang

trip v.2

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

[US]Eble Campus Sl. Oct. 10: trip – to act silly or stupid; ask outrageous or dumb questions.
[US]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.
Online Sl. Dict. [Internet] 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.

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