"She'd be guaranteed a 'stiffy' that night though, don't you think?"
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I ain't gonna touch that, Flashman. That's cold, very c-c-c-o-l-d.........;-)
Here's to the bride and ghoul
'Stiff' is also another term for corpse. Flashy was therefore making a play on words or a pun based on the fact that 'stiff' could be either a corpse or an erection.
That was a good one, can't believe I didn't think of it myself :-)