someone who is being a flat out meanie face cockmaster by either stealing something valuable, talking behind your back, etc... usually the person who needs to be cockslapped to teach them a lesson.
frank: that guy josh is a fuckpants
jonny: i know dude we should beat his ass
frank: thatll teach him to hit my girl
by scotty dotty October 9, 2006
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A person who is easy, a slut, a whore.
That girl I was with last night was a total fuckpants.

You fuckpants!

He's such a fuckpants.
by SabbathJustSabbath December 24, 2010
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When one's underwear remains entangled in their pants after both articles are hastily removed and thrown aside before sex.
After we nutted, we went to get dressed and found we both had fuckpants.
by Herb Kushman May 25, 2019
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