Top definition
A big shitty cold sore, that takes away ones kiss-ability for two weeks, in effect preventing you from going out, or from picking up a girl (or guy) during that time.
That kiss-blocker on her mouth looks horrible. She won't be making out tonight.

Jackass had just sorted his pickup-lines, when he noticed Melanie's kiss-blocker.
Without missing a beat, he eyed up Melanie's cute ass friend.
by Rifwalker July 11, 2010
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug