1 definition by LainaDee

Top Definition
The act of purchasing an ice cream cone, asking the man/woman at the drive through window if they believe in unicorns, and after their response you immediately smash the ice cream cone on your forehead screaming "Believe!!!!!"
Amy and Sandra went uni-coning at mcdonalds, getting ice cream all over their faces!
by LainaDee August 19, 2011

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