In Revenge of the Nerds. “Why they call you…Booger?” “I’unnno. [sticks finger up nose]”
First of all, he doesn’t fit the nerd stereotype. He’s not an academic – not dumb, either, but definitely not a techie. He’s more apathetic about socializing than inept. Of course, the nose-picking is anti-social, but that alone doesn’t make him nerdy. He’s more caught between thug and stoner.
So that would make him a Tri-Lamb by default. But again, he doesn’t seem to be like them. He doesn’t appear to be too chummy with any of them, either, except Takashi, who he can push around. His one skill (guitar playing) is creative, not technical (Poindexter plays violin, but that’s a nerdy instrument, and he’s an academic as well). He’s not mainstream, certainly, but you’d think he’d have other options besides Tri-Lamb.
So why wouldn’t he have been pledged by a party frat? He won the belching contest, after all: there are groups in which that would count for something! Or was Adams College so overwhelmingly Aryan and conservative that there were no such groups?
(And as far as that goes, perhaps Lewis and Gilbert are not the best and the brightest, either. Did they ever say that Adams had awesome tech programs? Perhaps it didn’t, and this was the best they could do.)