Defined by a Filipino host of Eat Bulaga (the most famous noon-time show in the Philippines) as "Aswang" or a Vampirelike creature in Filipino Mythology
1. to fling; become airborn
2. the action of a shot glass being released into the air from a particular mechanism of a patent pending product called a Drop Top
"When you pop the top of the can, the shot pwangs in the air and drops into the can of beer"