The art form of approaching a member of the opposite sex whom you are attracted to. There are many moves one mayplay, such as the "Have you seen my dog running around here?" or the oldie-but-goodie "O I dropped my pencil(right next to you)"
"Dude, Nathan is totally about to swoop on Jessica."
"Watch him go dude!"
"So the fat chick just swooped on me."
"How'd that go?"
"She tried the whole 'O i dropped my pencil maneuver'-I hope she never tries that again"
To make the first move in new romantic relationships. Typically, one person will be the swooper or more of a swooper than the other person. Hitting on someone, asking them out on a date, reaching over to hold their hand the first time, going in for the first kiss, etc. are all examples of swooping.
Jen: Tell me about how you guys met. Who swooped who?
Maria: We knew each other for a while, but he wouldn't do anything, so I finally had to ask him out.
Rod: Yeah, she's always been the swooper.