A smoothie slap is when a person randomly or purposfully walks up to someone holding a smoothie and Slaps it right out of their hand, then says:

"When the FUCK did we get ice cream!?"

Double points if your smoothie drechnes a hot girl with a t-shirt on.
So I walked up to this self rightious preppy kid on a colledge campus and Smoothie slapped him right in front of his hot tennis playing girl friend!
by Mad frenchman in London July 27, 2010
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