Verb

1. to fidget, to wriggle around

   Will you sit down and stop frigging around.

2. to masturbate (now especially of a female)

   She never forgot the day she was caught frigging in the library.

3. to fuck

   Come on honey, let’s frig.

   • 1988, Alan Hollinghurst, The Swimming Pool Library, page 113

     Not that we didn’t frig in the day-time too.

4. to mess or muck (about, around etc.)

   Be sensible, you’re just frigging about now.

5. to make a temporary alteration to something, to fudge, to manipulate

   The system wasn't working but I've frigged the data and it's usable now.

Noun

1. an act of frigging
2. A temporary modification to a piece of equipment to change the way it operates (usually away from as originally designed)

   I had to put a couple of frigs across the switch relays but it works now

3. a fuck

   I don’t give a frig!