45 degree Share definition Flag 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!!! 45 degree by yourbaby'sdaddy September 28, 2006 0 0 Get merch Get the 45 degree mug. Buy Now — $32.95 See more merch