A tactical, coordinated, and undercover swap between girls you and one or more friend(s) wish to attain.
You and a buddy are at a bar and each pick up a girl. Then, you decide you like your friend's girl more. Lucky for you, your friend thinks the girl you met is cuter. Slyly, you both redirect conversations and ease the ladies into the new rearragement. Next thing you know, you're maccin on the girl your friend originally picked up, and he's cheezin on the girl you found first. I give you the Doggie-swap.