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When you are constipated and need the help of Mexican food to clean out the pipes
"Hey John, you want to go to Taco Bell after class? I need some Mex-Lax, I'm a little backed up."
by LarryChicken December 12, 2011
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Jun 24 Word of the Day
An exclamation made when your friends or family are teasing you to a point where you can't handle it anymore and a hissy fit is in order.

Derived from a YouTube user's famed outburst following Britney's lackluster performance at the 2007 VMA's.
Sarah: 'OMG Susan, I can't believe you are wearing the same skirt as yesterday. Oh, and by the way, EVERYONE knows what you did with Kevin on the weekend. Plus you look a little fat, are you retaining water?'

Susan: 'LEAVE BRITNEY ALONE!'
by Billy Chickenhole September 15, 2007
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2
14 year old Mexican girl also known as the brown streak in roller derby.
Mexlax is a great roller derby girl!
Mexlax will beat the crap out of you!
by damncat December 23, 2011
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