If you break the promise you have to fuck the person that you made the promise with.
Paul: You have to fuck swear you won't tell anybody.
Janet: I fuck swear Paul
by spum778 January 26, 2016
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Like a pinky swear, but the promise is sworn through fucking, as the name implies. The promise has a much stronger bond than that of a pinky swear.
Yeah, Janice and I plan to fuck swear to each other that be would be together forever.
by Kago Kazuma February 4, 2016
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A response to people who ask you what your mother would do if she heard you cursing.
Student: What the fuck is going on with the lights cunt?

Teacher: What would your mother do if she just heard you?

Student: She’d tell me to stop fucking swearing!
by STOpfuckingswearing February 16, 2019
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1. To agree with something.
2. Reaction to something that went from.
1.Lets go to the Package Store and get some beer.
Fucking F-Swear, lets do it.

2. Dude, you just split beer on the floor.
Aw, fucking f-swear
by Anonymous October 16, 2002
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