When two people engage in this, you'll know. Open a window, turn on a fan, and hope you're not a direct relative of either party.
Brad: "Dude, open a window, I just smelled them fitzing the schlitz."
Tim: "Shit, that was my cousin"
Brad: "Dude, you just got fitzed by relation"
Tim: Commits seppuku
Tim: "Shit, that was my cousin"
Brad: "Dude, you just got fitzed by relation"
Tim: Commits seppuku
by Larroldo Rivera May 10, 2007
Having missionary sex with your partner, stopping halfway to puke, then finishing the act. Then puking again afterward.
by WKRP in Cincinnati October 5, 2009