Generally used sarcastically to exaggerate the appeal of a date. The date may or may not be real, and although the date might actually be "hot", as in exciting, it's just as likely to not exist at all or be boring.
Are you going on a hotdate tonight?
Yes. With my Mom.
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?"