Top definition
When going down on a girl and in the process she starts her period, unknown to you.
"Jane forced him to munch the rug last night and he ended up looking like a red lipped ninja."

"Bobby was going down on Sarah when she totally red lip ninja'd him. What a bitch."
by thatoneguyuno May 10, 2010
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Dirty Sanchez Plush

It does not matter how you do it. It's a Fecal Mustache.

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