The act, or repetitive 'art' of dating exclusively during the winter month(s).
Obtaining a boo for the winter, or colder months, as there are less likely to be summer-like events. Thus causing a desire to maintain a monogamous relatioship until the spring and or summer arrive.
Dude#2 Cuffing for the winter huh? Looks like Boovember is in full swing...everyone is getting in a relationship.
Woman#1- You know I need a man for winter!
Woman #2 - Girl, Boovember is here again, whats he getting you for Christmas (or other religious winter holiday).