Definition
To throw oneself into doing something, especially a leisure activity or something physical.
How People Actually Use It
To go to a place i.e a club or pub and mingle with women or men,with the intension of pulling one of them.Or mearly to go into a place an hav a really good time.
"Lets go to Yate's and get amongst it Lets go over to them fit birds an get amongst it"
Source: Urban Dictionary