To jizz on the face of a girl and stick your dick to it. You then wait until the jizz is dry and crustified, and PRESTO! your wong is lokked to her face.
Jeff: Hey, how did your date go last night? That chick was hideous.
Adam: Really well, she passed out and I pulled a lok wong on her.
Jeff: Wasn't she pissed off when she woke up with a dick stuck to her face?
Adam: Nah man, she looked in the mirror and it was actually an improvement.