One of many completely ridiculous sounding words used to describe something which is obviously born in the mind of someone who is twacked (see twacked)
A junkie who drinks very cheap cider to get wasted and shag birds. Associated with the terms "Fuck aye" and "well off it"
I was walking through the glen in Viewpark and I noticed a guy drinkin carbon white shouting "fuck aye" im "well off it" and saying he wants his hole. It must have been a willabeena.
This type of person will never hesitate to tell you how much pot he is going to smoke when he gets home, but not before he shits his diaper and parks his car in your living room.