DGAR (pronounced dee-gar) is an acronym for "Drop Group And Requeue," a phrase coined for use outside its native World of Warcraft context. (In World of Warcraft, the Dungeon Finder tool allows players to queue up for groups with which they can explore instanced content. If a group is bad, players can "drop" the group, and requeue, giving them an opportunity to try again with another group.)
I showed up for my date, tonight, and that girl was fugly, so I decided to DGAR. Thankfully, there were some Hot and Ready girls at the bar, and things went well.