'Mavs' is a slang word to describe many things. One being 'beer' one being 'Balti' one being 'sesh' one being 'birds' (females) and last being 'a historic rugby club who are ranked number one in the world'
Mate get the Mavs in, I'll get the next round, Oi mate do you have a mav yet ? Mate do you wanna go for a mav this weekend with the boys ?
Comes from the legendarystudent hr. Zlause. And the danish word for stomach. You have Zlause mavse when you have you have a bad stomach ache, and you can't show up to a party.