Originally used to describe being embarrassed or feeling foolish. Now more literally used to describe a poor clean up job after jerking off or getting a blow job, where "egg" is visible in an obvious place like the jeans, shirt or face. Which can cause embarrassment.
I went home for a nooner and spent the rest of the day without realizing I had egg on my face.

My girlfriend gave me a hummer before we hit the clubs, we thought we did a good clean up job, but when we got under the black lights we realized we both had a little egg on our faces.
by BSB724 July 24, 2009
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Egg on your face is a clear synonym for having ejaculate on one's face.
Betty - "just make sure to get away before you get some egg on your face"

Janet - "I would hate to get egg on my face"
by pinballer101 February 8, 2010
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You “have egg on your face” when you say something stupid,or you do something that makes you look stupid.
Also to suffer embarrassment as a result of a public failure.
To have egg on your face: I was so nervous to speak with the boy i like that i said a lot of silly things...Tomorrow i’ll see him again at school, and i have egg on my face..!
by *Nero Cristallo* January 24, 2018
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