The giddy feeling of joy and elation you get when ether finding or using a new app; most usually on the phone.
Bro1: Dude, what are you doing here? Weren't you going to hang with Janessa?
Bro2: I've been trying, man! Her girlfriends convinced her to get Instagram last week, and she's been so appy that she won't text me back.
Bro1: Just get an Instagram then.
Bro2: Does it look like I have testicals to you?
An adjective to describe a non-jewish, Jewish American Princess. The goy version of jappy.
Larry: "Oh man, did you see her face when her mom said she wouldn't buy her that gucci purse? She's so jappy"
Ben: "Yea, but she's not Jewish."
Larry: "Good call. She's appy"