when your sitting at school/work wearing tights and they itch like mad, then when you think no ones looking you scratch yourself and everyones like wtf
half way through my maths exam i had a numby bummy, i went to scratch myself and john saw :O
by icsyoucan November 21, 2009
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When you or a friend drop a piece of coke on the floor but find and pick it up to get the numb feeling in your mouth rather than waste it.
Me: Dude you dropped some!
Friend: No worries I'll get it as a dirty numby instead!
by KatnessEverderp June 22, 2019
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