(n.) one who has done a massive wet crap in their pants. Most of the time, the poop can be seen seeping through the underware, etc, and usually there is a horrendous odor associated with him/her.
\"Yo! Did u see that Poopsie pants over there?!?!? He was leaving a streak of messy poo when he walked past!\"
1. Most common usage: When a person realizes they have to poop in the bathroom when they are only attempting a number 1.
2. When a person mistakenly makes a poop when it is not socially acceptable.
1. I thought I just had to take a pee, but once I got in the stall and started to pee I pulled a poopsie daisy and sat down to dump one out.
2. When I was on the treadmill I had a little poopsie daisy moment and had to run to the bathroom.