a large set of women’s breasts that perform a lively mating dance with the eyes of every man whos body is coursing with testosterone (A man need not be in eye-shot of such a spectacle to be effected as his...ur, umm…”divining rod” points the way like a compass to magnetic north.)
Dude: Scope those curvacious maidens. I’ll pounce the coal top with the bouncing betties. What’s your ruling on the blonde?
Wingman: The dewclaws are up.
Getting your next relationship set up before dumping your current S/O. Generally involves cheating (at least emotionally) on your current partner with the intended future partner. Refers to playing on the monkeybars, where you don't let go of the first bar until you've grabbed on the second.
Bill: "Well, your brother just sent the Save The Dates for his third marriage - they haven't even finalized the divorce yet!"
Joe: "Yeah, the monkey branching SOB did the same for his second marriage as well - all his relationships 'overlap,' if ya know what I mean."
OR
Joe: "Sue and I decided to try an open relationship."
Bill: "I dunno, sounds like she's monkey branching to her *next* relationship."