It can mean jolgorio, parranda, revelry, francachela, fun. It is also the name of a tango by Uruguayan composers Roberto Fontaina and Víctor Soliño Seminario and the music is by Juan Antonio Collazo. Party, partyman.
Lunfardo is " feast or meeting, especially night with dancing and drinks " but also defines the garufero or regular attendee at these festivals almost compulsively. The etymological origin is not very clear, probably comes from " 34 rogue; or " granulla " ( set of loose grapes, arrivals cluster ) as a reference to the missing person; or maybe " galdrufa " ( 41 spin; for the dance and its twists.
It is an adjective Word for people with tendencies to be abusive, blatant, essentially ambitious and that breaks with anticipated deals, without observing rules in dealing with people. Example: buy a kilo of merchandise but the garufa gives 800 g; with all cynicism not admits or denies the deception. When it extends hand to share such a handful of sweets, the garufa snatching many for if same.
Garufa: Jesus is the clubbing, or nightlife.