How about
fapping? Or 'shaking the donkey'? Or 'Having tea at the one eyed vicars house'? Or 'Giving it up for Jesus'? Or 'Pinky milky dinking'?
(
The Neville What what what,
Mon 15 Dec 2003, 15:24,
archived)
nope
none of that, neither.
(
clangers,
Mon 15 Dec 2003, 15:24,
archived)