the group of people who don't shower, and are fond of racing and cars.
Joe and the rest of the stinky posse showed up at the pub after the dirt track race.
A group of older people.
the older guys at the department are the prune juice posse
DA posse is a gang of wannalags hoping to take on any nearby gang in their hood!!!
Me and ma mate from the science are gonna round up some wannalags for DA posse to take on EBC o the weekend:p
A collection of 20 something ladies who hang around together.
I want to go out but with that girl but she wants to spend time with her Puma Posse.
A large group of grad students at Penn State who drink away their worries every week (and usually multiple times per week) at a hole-in-the-wall bar. Generally only consists of science-minded grad students. (N.B. The "groovy" times do not always have to involve alcohol, and can, in fact, involve many different substances.)
Last night I went out with the Groovy Time Posse, and bitched about undergrads while taking tequila shots.
Being so buzzing that you start to talk without reason or meaning.
"Dude josh was so fucked last night I swear he was diddly possing all night"