Green’s Dictionary of Slang

1. the finger or hand with which one masturbates.

1684

Rochester (attrib.) Sodom II ii: Ive long considered of your royall want / And grieved to see your gapeing Cunt, / Toucht your Large wombe and urged my frigger still, / Tired my weake arme your pleasure to fullfill.

2. the penis.

1684

Rochester (attrib.) Sodom III i: Great Bolloxinians frigger beats allarmes, / By unctious poyson in her Cunt infus’d.

3. a masturbator; one who masturbates a partner.

1888–94		‘Walter’ My Secret Life (1966) I 129: Suddenly one cried ‘f— fi— first,’ as some drops of gruelly fluid flew across the room, and the frigger sank back in the chair.
1909		Joyce letter 9 Dec. to Nora Barnacle in Ellman Sel. Letters (1975) 186: My little naked fucker, my naughty wriggling little frigger, my sweet dirty little farter.

4. a general derog. term.

1952		M.F. Caulfield Black City 26: They got three of our fellas last night – the Mixer, Harry Fay [...] That frigger Monahan – Sullivan spat.
1962		H. Livings Nil Carborundum (1963) Act III: Nev, there’s some frigger in there.
1973		B.S. Johnson All Bull 34: Ask some of these fornicating friggers who live in this one-horse town!
1989		Viz June/July 12: Y’fuckin friggers!
1994		P. Quigley Borderland 55: ‘Mad frigger,’ Black John sneered.
2003		N. Griffiths Stump 186: Yeh dirty frigger.