'is your mom gay' is a commonquestion asked my bullies at school. A correct answer is 'which one' but if they hit you with the 'both of them', you are fucked.
Person 1: Is your mom gay?
Person 2: Which one?
Person 1: Both of them.
Person 2: Fuck
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?"