Jan is a fatass, out of breath ass, dating muscle man headass nigga. Thus meaning stay away from this nigga man for your own safety
Jan sucks nigga penis
A term originating from the popular phrase "Sure, Jan," it is a nickname given to someone you know is a liar. It can also be yelled at someone sporadically during a very important Twitter debate, or when some autist you know is obviously lying.
Tl;dr, Jan is a liar.
You can also use it as a nickname for obnoxious valley girls nobody likes, similar to Karen, but 16.
Jan: You don't have to worry about him Tod, we're just friends.
Tod: Sure, Jan.
Someone who falls asleep when they should be still drinking 18 hours later
“He fell asleep at 7am!! What a Jan”
A guy who crawls around the streets in a diaper at 4 am after several beers using his mating call to attract hot Czech women
“I hear someone shouting on the street”
“That must be Jan then”