When a girl (probably a beginner) gives a guy a hand job but fails to notice he has reached a climax. The girl continues past ejaculation which somehow turns the guy into a writhing version of the Swedish chef from the muppets.
P: #rub rub rub#
J: oh oh oh!! Squirt
P: #rub rub rub rub#
J: her def flerpin de flip flip fermer de her den gerben. Stop!
P: "I didn't know you'd finished, or that you spoke Swedish ."
J: "Next time read the stop sign Forest Gump. You turned this into a Swedish Handy Jay"