When you are having sex with your girlfriend and all of a sudden your cock flies out of her vagina/arse and you thrust it painfully into her thigh/butt cheek
1. She was riding me hard and then all of a sudden I was doubled-over in pain due to random fall-out
2. Don't fuck that guy, all you get is random fall-out
3. Nic: "Let's have some freaky sex"
Justine: "As long as you can control the random fall-out"