Twigging

Tripping/Tweaking/Bugging

If one is twigging, they have just said a twig. This logically makes sense, because a twig is skinny and fragile; a twig is hard to support. Thus, it is synonymous to tripping, because if someone is tripping, they have just said something that is crazy, or hard to support.

Nah, you're twigging bro.