An excuse for having sex with someone you should not have had sex with. Usually a bad, quickly made up lie.
John: "How could you cheat on me with Derek!'
Mary's sexcuse: "...I fell on his dick?"
by hey-j February 21, 2012
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The act of 'accidentally' forgetting an article of clothing or object to give yourself a reason to come back to someone's place and fuck.
When Jeremy left his hat at her house, she was convinced that it was a sexcuse article. This was proven a fact when he asked to come over to collect his hat because he wanted a bootycall.
by josefiend July 9, 2011
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Using your gender to validate stupid decisions, even though these actions aren't valid at all.
My only sexcuse is that I want to act as crazy as I want and eat anything I want this week. (For girls)

My only sexcuse is that I want to have intercourse with as many girls as I can before I lose my hair. (For guys)
by bauerboo March 21, 2014
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When you are late for something because you were having sex. Like a get out of jail free card, no want asks details, they just say good for you.
I’m late today, I’ll have to use another sexcuse.
by Simplyloved April 2, 2018
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