look up any word, like half chub:
 
1.
When you have three things going on at once.
*dude is on the phone, paying the pizza guy at the front door & brushing his teeth*

phone caller: " I cant understand what your saying..."
Dude: "chill man, I got s**t going on trimultaneously here..."
by Kali Vastel February 25, 2008