When girls hoard large amounts of shampoos, nail polishes, lip-glosses, and general goo-esq. makeups. (Founded by Jenna Marbles' on screen boyfriend Max in the "What I dont understand about girls" episode.
When a gentleman caller tries to impress his female counter-part by engaging in behavior that would typically be more understated in normal situations.
Kevin: Look at Matt yelling at the TV like an idiot. He barely even likes baseball.
Ray: I know. He's just show-horsing because his girlfriend is here.