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!
Johnny: Holy fuck man, she's giving me a raging Arnold!
by Johnny Massacre October 1, 2010
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