a. a word used by members of the Delta Sigma Phifraternity as a general salutation. Its actual meaning is kept under tight wraps by the fraternity, and a favorite hazing ritual of initiation is to have pledges come up with definitions/acronyms for it.
b. something men of a certain upbringing and moral fortitude say to one another in order to make themselves feel important
"dude, i totally tagged six or eight hot chicks last night at that wedding! i think one of them might have been the bride..."
yitbos,
DrinkrDude97
A man afraid of females and is asexual. He finds comfort around men and would rather go on dates with men then women. But still will not engage in sexual activity.
That guy over there is kind of Yitbarek, I have never seen him talk to a girl and he is always around men.