v. - monkey vining is the act of transitioning from one relationship to another by retaining some form of connection to both people simultaneously. Only when the new relationship is reasonably solidified is the former one wholly released.
To grasp the metaphor of the monkey vine in its entirety, one may simply visualize the mode of transport utilized by Tarzan and his jungle primate colleagues in old movies. The vine that is being swung on is firmly held until another vine is being grasped, or at least is easily reachable.
Hey man, do you think Brad Pitt was monkey vining from Jennifer Aniston to Angelina Jolie?
Actually dude, I don't give a shit about what's happening in the love lives of these celebrities. 9/11 was an inside job, and fluoride is making Americans stupid. Maybe you should monkey vine your ass from US Weekly to some web sites that will enlighten your ass on things that are truly relevant to our lives!