When you have unprotected sex with a girl and she starts her period a couple of days after
Yeah man, I totally forgot to pull out the other night. Fortunately she just started her period, so I had a lucky nut
Nutting over your shoulder after sex so you don't get a chick pregnant.
Yeah man nut lucky works, I'm lucky I won't be a dad!!
the act of nutting over your shoulder to stop a chick getting knocked up.
Dude nut lucky works better then pulling out.