Top definition
When a conversation or actions from a girl indicate that she is a bit loose/easy.
It is 'Slag Behaviour' when a girl classifys a good night out where she was the centre of attention of one or more males.

It is 'Slag Behaviour' to give your number to a guy you have just met

When a girl is in contact with several ex-boyfriends, that is 'Slag Behaviour'
by Az101 November 10, 2007
Happy St. Patties Day!