1.when one person takes the cum from a cock during a blowjob, and kisses it into the mouth of the other
2. when two guys kiss the cum from each others cocks back into their mouths
she came up and kissed me, dripping my cum back into my mouth, after she blew my cock; she cum exchanged into my willing mouth
An agreement between good friends, in witch, while having intercourse with their respective lovers, will cum on the face of said lover, and pronounce it as a gift from the friend.
So me and Zach have a cum-pact, and Cat was seriously pissed after I finished and told her, "That was from Zach."