When one's anus pulsates inwards and outwards excessively quick in a short period of time. This can lead to sever and painful anal prolapse.
Josh: DUDE! I was so fucking constipated yesterday and when I finally had the relief of shitting my brains out my asshole did the weirdest thing.
Dave: Did you have an anal aneurysm?
Josh: Probably...
Dave: Did you have an anal aneurysm?
Josh: Probably...
by CaptainShovel February 27, 2015
Get the Anal Aneurysmmug. When you're catching feelings for someone and you know you shouldn't so your brain does all it can to stop it
by Bigolepappy August 11, 2017
Get the anal rape aneurysmmug.