Jodrell (Bank), n. — Green’s Dictionary of Slang

Jodrell (Bank) n.

[rhy. sl. = wank n.; ult. the Jodrell Bank power station]

masturbation.

1978		Maledicta II:1+2 (Summer/Winter) 118: He [...] also lists: [...] Jodrell Bank Wank.
1997		Roger’s Profanisaurus in Viz 87 Dec. n.p.: Jodrell rhym. slang J. Arthur (qv). From Jodrell Bank, the Knuts... fnarr fnarr! (qv) ... ford space research laboratory.
2002		B. Kirkpatrick Wicked Cockney Rhy. Sl.