When that one person has to but into a conversation and interjects their know it all mentality, pissing off the other members of the conversation.
Damn, Angelica is such a Brainy Smurf! No one gives a fuck what her opinion is.
Getting your testicles gargled untill they turn blue (blue balls)
Dude why cant you sit down?
Oh I just got The Brainy Smurf