An excessive amount of flabby and sometimes dimpled fat in the upper arm area that forms an unsightly crease around the elbow. The prefix "tri" is derived from the tricep area in the arm, of which the fat incases. The suffix "bow" refers to the hidden elbow of the suffering arm. Many researchers are finding a striking resemblance between the tribow, and its lower-bodied cousin the "cankle," but solid scientific evidence linking the two is yet to be found.
"Wow that tribow shakes like jello, I hope they stop waving."
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?"