Mainly a girl who is exceedingly annoying and is hovering around you while you are trying to pick up a girl at a bar, club, or other events (be it charity events, doctors office, the grocery store, party... we have all seen the overly drunk girl at a party on some guy who clearly does not want her). This girl does not necessarily have to be a friend, she just has to be annoying enough to ruin your game.
Nick: Dude, that bitch was such a twatacopter, she was just hovering around me the whole night as I was trying to pick up Emma
Harry: I know man, she was one of those drunk twatacopters too, just hanging off you you basically. Fuck, sorry man
The act of making a "raspberry" sound with one's mouth, while it is between a pair of labia. The vaginal equivalent of the "motorboat".
"Her baloney flaps were so large, I couldn't help planting my face in there and doin' the twatcopter." or "It's a lot harder to pull off a resonant twatcopter if she's got a 70's porno bush."
The average Twatson is 6'2" and weighs 220 lb. It inhabits northern New Jersey but can also be found in Arkansas or Maine, depending on the season. Its diet primarily consists of Jets and Diet Cokes from the Parkwood Deli, although it also enjoys the cock. Twatsons are incredibly fucking stupid and uncoordinated. They are always seen squinting and have an abnormally-sized big toe.
1. A worthless human being with little or no value to society. A perpetual fuckup. A person whose only legitimate purpose in life would be to serve as a literal human coaster for some female to rest her twat on.