Sex early in the morning. Particularly good for revenge sex, break-up sex, and "i was too drunk last night to know you're ugly but oh well let's go again" -sex.

Breakfast sex may or may not be accompanied with actual food.
She was so hot, I couldn't help but have breakfast sex before I left for class.
by yourfavoritepairofjeans October 7, 2005
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Sex before breakfast. Then she makes you breakfast.
Boy that breakfast sex was amazing. Do I smell bacon?

First we'll have sex, then ill let you cook me breakfast.
by myke66 April 16, 2011
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The extravagant breakfast you make to when you wake up earlier than your partner the morning after sex. A kind of thank you. The kind where even people that hate cooking will make it with a perky disposition, because they got laid.
"Look at all this food!! You never cook."
"Sex breakfast, bro. You wouldn't believe where she let me put it last night..."
by phoobar April 8, 2013
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