When you and your bros are chilling at a party, and you see a hot bitch and you "swoop" in. By swooping you are saying you will pick her up and then proceed to hook up with her. If it is not successful a bro must make an excuse for himself.
Micheal- "Bro did you go to the party at Broseidon's house last night?"
Alex- "Hell yeah! My bros and I did some serious bitch swooping!"