Partially-burnt, buttered band geek - used to describe band geeks during marching season, when they have those oh-so-lovely band tans and lightened hair due to being outside so long
also Partially-burnt, buttered band groupie - used to describe that person who hangs out with the band a lot but isn't actually part of the band yet still has the same features as above
(sometimes misheard as BBQ'd G)
non-Band Geek: You're such a PB^3G.
non-Band Geek 1: Why does he look like the other band kids? He's not even in band!
non-Band Geek 2: He's a PB^3G.