Teapot shake

When urinating, and towards the end there is a reduction in flow rather than the expected abrupt end, resembling the dribbling from a teapot. Thus requiring a vigorous shake to expel excess liquid.

I'd had a few beers and when I went for a pee I had to give it a teapot shake

Teapot shake

When a male is urinating and towards the end it dribbles like a teapot, to then be rectified by a good shake.

"I'd had a few beers so went to the loo I had to give it a teapot shake"