Behaving crazed or unreasonably because of excessive levels of testosterone. Over reacting in an angry or jealous way.
Relax, Dick! You don't have to get all testerical on me!
by sorrow jones November 09, 2010
A man totally overcome by his raging hormones and being just too male, especially when it comes to fast cars.
He became totally testerical when his girlfriend scratched his Alfa Romeo.
by Gwazel July 11, 2014