When you insert your closed fingers in a cone shape into the rectum then spread your fingers open you get the "blooming onion"
by Chateau64 June 19, 2018
The process of taking a shit in which multiple pieces of shit are produced and land in the form of a blooming onion.
by XCaliburger June 5, 2017
When you put an unopened umbrella in a man's urethra and, once it is firmly in place, you open up the umbrella.
Guy 1: Bro, my dick hurts so bad.
Guy 2: Why, what happened last night?
Guy 1: Sarah gave me a Mary Poppins' Blooming Onion and now my dick looks like the Sarlacc Pit.
Guy 2: Why, what happened last night?
Guy 1: Sarah gave me a Mary Poppins' Blooming Onion and now my dick looks like the Sarlacc Pit.
by djmagicb2002 January 29, 2020
by CarlTensine June 6, 2021