Top Definition
To administer an open-hand slap to the genitalia of a male, with a sharp snapping of the wrist so as to leave a stinging sensation in the wangular and nutsacular areas.
Sweet sassy molassey, after we felched and I forgot her name, she cock-walloped me so bad, my penis fell off and ran out the door! Come back Weenie McSexster!
by John Walsh April 17, 2004

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