Green’s Dictionary of Slang

whip off v.

[whip v.1 (1)]

1. (also whip away) to drink greedily.

[UK]Motteux (trans.) Gargantua and Pantagruel (1927) II Bk V 520: Drink on sirs, whip it away [...] fear not we should ever want good bub, and bellytimber.
[UK]New Canting Dict. n.p.: whip off to drink cleverly.
[UK]Bailey Universal Etym. Eng. Dict. [as cit. 1725].
[UK]Grose Classical Dict. of the Vulgar Tongue.
[UK]Lex. Balatronicum.
[UK]B.M. Carew Life and Adventures.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.

2. (UK Und.) to steal.

[UK]B.E. Dict. Canting Crew n.p.: Whip off, c. to Steal.
[UK]New Canting Dict. [as cit. c.1698].
[UK]Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
[UK]Grose Classical Dict. of the Vulgar Tongue.
[UK]Lex. Balatronicum.
[UK]in B.M. Carew Life and Adventures.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.

3. to run off.

[UK]O. Goldsmith She Stoops to Conquer Act V: So if your own horses be ready, you may whip off with cousin.
[UK]Grose Classical Dict. of the Vulgar Tongue.
[UK]Lex. Balatronicum.
[UK]in B.M. Carew Life and Adventures.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.

4. (US campus) to masturbate.

[US]G. Underwood ‘Razorback Sl.’ in AS L:1/2 69: whip off vi Masturbate (of a male).