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Topping it on the knob

Posted by David FG on September 12, 2004

In Reply to: Topping it on the knob posted by dalehileman on September 12, 2004

: Supposedly a British expression; can't find it on Google. Sorry but don't know the context

If it is a British expression, it's new to me. The best I can do is that 'knob' is a colloquial (and vulgar) term here (UK) for the penis. I can only guess that the phrase is crude, but I would like to know what it means!

DFG