Usually used as a noun, behindmen is slang originating from the female hymen. Behindmen is often used as slang for when a gay male has anal sex for the first time.
Voluntarily blinding one or more innocent drivers, in order not to miss the opportunity to turn on your own high beams and blind some jackass who won't dim his high beams for any oncoming traffic.
"Man, I felt bad for the other folks on the road tonight, but one asshole made me have to dish out a little collateral blindage."
An OG, doesn't show up to many Pipstar streams but everyone is excited when he does, always brings good vibes. Also he knows Geelong is better than hawthorn.