posh man's wank
Where a man wears a condom whilst masturbating, as opposed to catching the spunk in a tissue/ something similar. The word 'posh' is used to denote the expense of buying a pack of condoms for such a menial reason (to make the wank more pleasurable).
"I've still got some jonnies left over, I know, I'll have a posh man's wank."
poor mans posh wank
To put you penis in an old sock and masturbate
I fanceid a change so i popped him in my old sweaty sock