a. Invisible substance that emanates from excessively masculine men. Men with to much testostecockerone can be found at the gym sucking down protein shakes and staring at themselves in the mirror trying to compensate for their ridiculously small penises.
b. That smell that emanates in the male floors of dorms.
"The testostecockerone is just seething off of Jason when he starts sucking down that giant ass bucket-O-protein."