when your friend starts to date someone and they ditch you to hang out with their someone special. when it is severe enough then the name "weak-sauce" should be used. also appropriate if someone does something stupid or very embarressing.
guy: hey bro, wanna hit the mall up today

guy #2: no man im hangin with the lady tonight

guy: weak-sauce bro
by kennell936 June 26, 2011
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A nice way of saying "fuckin A" or "thats shitty" or after finding out bad information weak sauce is used. Kinda derived from Weak-ness
"Weak Sauce! This Sulfer guy keeps fragging me left and right."
by 0v3rkyll August 21, 2007
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A suburban white guy that shows at the ghetto gym and declares his range as "the gym" then proceeds to miss his first three layups in a pick-up game.
Yo Homie, your game is Weak Sauce
Damn, Weak Sauce, pass the ball
by Hoodles January 6, 2007
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Informing someone that their bodily fluids are inferior to the default human standard.
No, we do not want to ball with your weak sauce self. Your sauce is weak, son, get over it.
by word2k9 July 9, 2009
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Ex. Kanye West crashing the stage at the VMA's and stealing the mic from a 19 year old girl during her acceptance speech to talk trash. Weak Sauce.
by Loser Behavior Hater September 14, 2009
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applies to someone who tries to impress you or do something cool, but instead acts similarly to a mentally retarded kid hooked on ice
*Andrew(at school recess in the front of hot chicks):Hey guys this sucks lets play soccer in the hallways!!!
*Aaron: That is fuckin weak-sauce!
by mauiyob July 11, 2008
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