origins from "roller blinds". Keeping out LOL or fun like roller blinds keeps out the sun.
When a person is having his/her lollerblinds down, nothing seems funny. It could either be due to a bad day, or a lacking sense of humor.
I really tried to make her laugh, but she totally hard her lollerblinds down", "Wow, that joke really made her pull up her lollerblinds!", "That guy have had his lollerblinds down for the last couple of days"
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"