Laying in bed under your covers with the a/c on high while watching old episodes of t.v. shows and eating massive amounts of food often including your sisters brownies.
1) The act of going to bars.
2) The state of mind of going to bars.
3) A phenomenon where a profoundly singable song comes on in a bar and everyone starts singing it. Typically leads to an increase in the average outgoingness level of the bar's population as people put their arms around strangers and sing in the wrongkey in order to enable more volume. Note: pronounced "bar-sing" in this particular usage.
1) We're going barsing later. It's gonna be so fleek.
2) I'm barsing mad hard right now and my mind's fleeking out.
3) That Hootie song came on and it turned into a massive barsing. It was fleek.
The act of wearing all of your Chicago Bears accouterments(Jersey, Hats, Shoes, Pants, Jewelry, etc..) around town while running errands after a huge victory so you can let everyone know who you represent and to Bear Down.
After the Bears beat the Packers in the playoffs I woke up and decide to go Bearsing around town.