Formly to Have sex with a girl, also used in the context of getting something done.
Example 1
Person 1: she's fit youth.
Person 2: wade in knacker deep then mate.
Example 2:
person 1: I think i'll go to the bar
Person 2: Wade in then mate while your at it get me a pint too.
Buy a
wade in knacker deep
mug!
