A sexual activity in which you sodomize someone very vigorously and aggressively, with the intent of causing them to bleed from their rectum.
After I took her home, I gave her the ol' berserker.
by the letter d October 26, 2007
A norse warrior who drank the pee of slaves (trells) after said slaves had eaten mushrooms. The physical exertion of battle would kill the warriors if the mushrooms hadn't been filtered first.
Holy crap, that berserker drank a whole barrel! Those English are gonna get it today!
by Biggin May 11, 2006
What you proclaim after ruining someones shit in a game of CS or Halo 2.
I totally went berserker on those blues didnt i?
by Cheesebadger January 09, 2005