Raging Arnold

An enlarged, rigid and rock-hard state of the penis caused from sexual excitement, and a metaphor for Arnold Schwarzenegger going totally crazy with rage/anger/pain.

David: Dude, did you see that bitch over there with the thong poking out of her miniskirt?

Johnny: Holy fuck man, she's giving me a raging Arnold!

Arnold Rage

When you get to a point in a game, whether it be a video game, board game, etc. and you become unstoppable. There is no way around avoiding a person on Arnold Rage, you just have to suffer until the event ends.

Guy 1: "Dude, it's your turn!"

Guy 2: "YAH! HAHAHA! ARNOLD!"

Guy 3: "...Crap. Arnold Rage."

Guy 1: *sigh...*