There are several varieties of these, differentiated mostly by the type of their wings(fairy wings, dragon wings for example), and the curvature of the dong, which depends on the humor and personality of the flong.
They appear frequently, particularly from Thursday to Saturday nights, on the white boards on doors in the student residences in Vermont, their natural habitat.They are known to be agile in the air, and frisky when excited requiring extreme care when handling.
"You're a flong!"
or used as verb: "Man that exam was hard... I got flonged by the last question!"
You have a table, and 1 person from each pair is standing at a head of the table. So at first glace it looks like ruit, but you are actually standing ACROSS from your partner. Each person has 4 cups lined in front of them, and each pair has a ping pong ball. The objective is to throw the ball into your partners 4 cups, if you sink one, then your partner drinks it, and plays flip cup with it. Once he flips it, he can shoot on your cups. First team to flip all 8 cups, wins. It is a game of speed, which makes it infinitely better than ruit.
What makes it different is also that the winner drinks more than the loser, usually it's a full beer for each four cups. Plus a game with good players takes about 3 minutes, so more people get to play.
The word can then be expanded upon and used as a verb.
"I'm flonging it"
"I'm feeling flongalicious today"
"I'm flon flong flashing"
"Dude, if Sandy doesn't let me flong her tonight, I'm dumping her.