Commonly used by Danish west-coast citizens for full-sending it (giving it everything) in terms of alcohol and dancing at Bernhardts.
More specifically, it refers to drinking way more than your lads, meanwhile giving zero fucks about relationship status by participating in sexual matters out of wedlock.
Hey Brandt, I'm gonna give jen over æ nak and sleep with that fat fuck dancing in the corner
Yo Simon, you've only had one beer? I thought we were going to give jen over æ nak.