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3.
A 45 degree is when a guy is masturbating really fast and he accidently jerks it the wrong way too far and it snaps.
Oh snap!!! Call the ambulance!!! i just 45 degreed myself!!!
by yourbaby'sdaddy September 27, 2006
 
1.
Used when referencing something that manly men do not do but is considered common for homosexuals. "ie limp wrist"

SPOILER...

Taken from the joke about "the difference between Hitler and a homosexual".
Passer by: "so there were four guys talking about the twilight series and debating whether it was a romance or a tragedy."
Guy: "they're all 45 degrees"
by athletictrainer May 30, 2012
 
2.
A lazy co-worker that is always leaning (at 45 degrees) on something while everyone else is working.
Travis is leaning again. Man that guy is one lazy motherfucker. He's always at a 45 degree angle. We shall call him "45 Degrees".
by Nojunkinthattrunk July 23, 2011