When you pull the buttplug out, but the butthole remains open, AKA anal gape
Omg I heard Rose licked Erin’s rusty shutter, I swear those girls belong in Brazil!
When you're lured into someone's house under false presences, only for your host to 'let the shutters down'. Usually under the guise of a sporting event
I’ll put the shutters down on Saturday if we go back to mine to watch the rest of the games
The act of one looking good.
Damn Jim, you lookin space shutter (good)
Similar to a Peeping Tom, a Shutter Sheldon is a creep who takes/obtains inappropriate photos of someone who is not aware of it. This can be done by incognito photography or by going through a person's personal photos and sending said photos to themselves for later viewing/use.
Also applicable as a verb.
Noun
Jonathan took pictures of a girl while she was changing, this makes him a Shutter Sheldon.
Verb
"Friends don't shutter sheldon their friends. That makes you an asshole."
I have a window shutter. I hope your mouth can be like it