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."