This happens when a dude that has braces on his teeth is going down on a girl that is quite hairy in the nether lips and his braces get ensnared in her pubes, thus locking his face lips onto her downstairs lips.
-Hey, did you hear about Timmy?

-Yeah, I heard he went down on that random girl at the party, and they got lip locked.

-I guess that's why you need to check before you munch.

-True.
by valet6969 October 09, 2011

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