Similar to "roid-rage" but brought on from over consumption of Jagermeister. Typical behaviour is once past the "I love you man" stage, one progresses into trying to fight all of your friends. Any girlfriend can also be targeted for guminski wrath.
I was out with Ron on Friday and he totally pulled a guminski. He punched me in the face and smacked his girlfriend for breathing through her blood filled nose.
by tracy's uncle May 04, 2009