Some consider this "Pittsburghese". Many people in Pittsburgh speak so quickly and with so little enunciation, that you often get phrases like "J'eat yet" or something about the Steelers and drinking into a three word sentance.
This particular phrase, however, is merely, "Did you eat yet?" Although, it can also sound like "Jeat jet?".
"Hey Bobby, I was going out for food, j'eat yet?"
"Not yet Jane, I'll come grab food too."
Though some people may think that they are superior to others, and therefore believe only people in Pittsburgh say this, j'eat yet is a sped-up pronunciation of the phrase "did you eat yet?", said throughout the country. It is especially notable in rural South Dakota, Appalachia, and (apparently) Pittsburgh.
When heading north to Brookings, SD on Interstate-29, Bobby saw a sign advertising the Pavillon Bar and Grill. The sign said "J'eat Yet?" and advised Bobby to take exit 130 and turn left. Bobby though to himself, "No, actually, I haven't had a thing to eat since early this morning," and proceded to the Pavilion and ordered a delicious stake and fries.
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?"