1. rude slang To go away. Frig off, will you? I don't want to hear any more of your ridiculous conspiracy theories. I could tell the lecture was going to be pointless, so I frigged off and went to find someone to hang out with. Frig off, bro, I'm not cleaning up your mess!

2. vulgar slang To masturbate (oneself or another person). A noun or pronoun can be used between "frig" and "off." I was frigging off when my roommate walked in on me. Talk about mortifying. Jack talks on and on about how much of a ladies' man he is, but I bet he frigs off most nights.