Top definition
Derived from the male pre-wedding drinking tradition - the Stag Do.

A gathering of women on a "Hen do" where all 'women' present are drunken slappers desperate for cock.
A Slag Do is essentially a Hen Night but where all the women present are drunken slappers desperate for cock.
by wintercooled February 28, 2011
Get the mug
Get a Slag do mug for your Facebook friend Bob.