1.When you fuck so much you go into a sex coma and black out
2. When your done with something and going to bed
3. Also short for knocking someone out or kicking someone out of your house.
1.Jane Doe: Ohhhhhhh.....i'm gonna fuck out!
John Doe: Oh yeah fuck out bitch.
2.Tim: I'm gettin the fuck out and going to bed so i can fuck out
3. Get the 'Fuck Out' or you just got knocked the 'Fuck out' or 'Fuck out bitch'