title given to someone (preferably male) used to joke and play around with his friends then due to a sudden life change or other circumstances has decided he is officially too grown up for such shenanigans.
n. often found when one enters into the professional world from college or graduate school.
Johnny used to join in on the fun of drinking and playing hilarious pranks with his friends then he got a job in the real world and decided to put aside those "childish" things. He is now referred to by his friends as Mr. Serious.
Pete: you think Johnny will hang out tonight?
Steve: you mean Mr. Serious? I doubt it.
Pete: makes sense. what a douche.
Someone who takes a humorous status and leaves a longdrawn out comment bringing everyone down
Status: a homeless guy asked me for a dollar today I said of course do you have change for a hundred? Lol
Comment: Homeless people have no choice but to pan handle, what if it was one of your ralatives? The are 30,000 homeless people in our city.....blah blah blah
Comment: it was just a joke Super Serious Facebook Commentor!