When you let off a load on some one's face, usally done in sexual intercorse.

OR

A woman/man who has a pasty white face, resembling some one who just got shot by a meat cannon.
Dude, I totally Mayo faced Kayla last night, it got in her eye.

Man, that kid is such a mayo face, tell him to stop getting shlong shot.
by 9a9a91919ngf8181181 February 19, 2006
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