The look a guy gets on his face while masturbating. Most males get a jerk smirk on their face because of the uncontrollablepleasure they are feeling. A jerk smirk can last for several minutes after a guy ejaculates.
Duder 1: "Hurry up in there dude, I gotta trim my bush."
Duder 2: (comes out of bathroom) "Sorry dude, it's all yours."
Duder 1: "What the hell is that jerk smirk on your face for? Awww dude if I step on any of your nasty ass cum..."
(v.) to roll one's eyes whilst concurrently simulating (male) masturbation , used whenever one encounters absolutedouche-baggery or ridiculous-ness.
"I was TOTALLY pulling a smirk-and-jerk as my ex was telling me over the phone how he didn't miss me at all when my phone's missed call log proved otherwise."
I was feeling really stressed at work today, so I locked my office and closed the blinds for a good ol' shirk and jerk to relieve my tension before the board meeting. Totally killed the presentation!