look up any word, like swag:

1 definition by Beztheowl

The phenomenon of shrinkage apparent in the male genitalia during and immediately after participation in physical (usually sporting) activities.
“Bloody hell Brian, you’ve got a knob like a pre-pubescent schoolkid! What's going on?”

"Oh don’t worry about that, I’ve just got back from a 5 mile jog and I’ve got a proper Sportsman's Willy”
by Beztheowl July 29, 2009
9 0