Green’s Dictionary of Slang

1. (US) a country dweller.

1911

Wash. Post 10 Dec. 4/5: A ‘whisker’ is a countryman.

2. (orig. US) a very small, infinitesimal amount or distance.

1898		F.P. Dunne Mr Dooley in Peace and War 78: He bate th’ cat to th’ windy be a whisker.
1913		G.D. Chase ‘Lists From Maine’ in DN IV i 6: whisker, n. A little; a trifle. ‘Move it just a whisker.’.
1953		A. Buckeridge Jennings’ Diary 110: I haven’t seen a whisker of a prehistoric remain yet.
1971		A. Buzo The Roy Murphy Show (1973) 125: Country to win by a whisker.
1999		Indep. Rev. 23 July 13: I’m a whisker away from 30 now.
2000		Indep. Rev. 5 May 12: I wrote a screenplay and it came within a whisker of selling.

3. a young woman.

1928		Hecht & MacArthur Front Page Act III: Can you imagine Butch laying up with some whisker at the Revere House!
1966		Trimble 5000 Adult Sex Words and Phrases.

4. (Aus.) the pubic hair.

1939

H. Miller Tropic of Capricorn (1964) 192: Rita too was hot under the whiskers.

5. the penis.

1999

D. Lypchuk ‘A dirty little story’ in eye mag. 8 July 🌐 The two of them dabbed the brush, danced the goat’s jig, dug in the whisker and swept the chimney until, just as he was about to do her a kindness, his sweater fell off and he had to put a new willy-welly on.