printed circuit board this is a board that your computer,tv,vcr (basicly all manufactured electrionics(although this can be done by hand on a amature scale)) components are soldered to.
Premature Coupling Behavior. When your casual date or acquaintance begins to display unsolicited acts normally reserved for serious couples. ie hand holding, arm around waist, invading personal space, etc.
Kristen: "That guy at the bar just bought me a drink...Then totally tried to hold my hand!"
"Professional Cock-blocker" someone who gets in the way of a person and their significant other spending time together and/or having sex so often they exceed the level of cockblocker.
"Your little brother is a PCB, he's always following us around."