After a guy ejaculates inside a woman’s vagina, despite attempts at cleaning, it can stay present for rough 2-24hrs. During this period, at random (usually an inopportune moment), the warm cum will be discharged. This is kerplopalopin, it could be used as a noun or verb.
A Kerploofkerburger is the practice when a man sits in the couch cushions and waits for a man or women to sit on his face and either queef or fart in his mouth.
John: Kara didn’t know but she gave me a kerploofkerburger last night when she sat on the sofa.