"Small Brain" is an insult that implies that the person it's being attributed to has a small brain
That was small brain move, Ryan.
A girl that has one titi bigger then the other titi.
This chick showed me her titis and one titi was bigger then the other titi so we called the bitch biggie smalls.
A Dick 5" or less with no gerth.
You know it is just too damn small, because no matter how hard, or long you ride it, or how wet you are you can not get off, and he already came four times.
Girl#1:Did he have a small Dick?
Girl#2: Yeah it was small, I could feel it, but barely, and it didn't hit any of the right spots to make me cum girl."
Girl#1:"Definitely don't see him again ."
Similar to the usage of do work, get small can mean a number of things depending on how you use it. Perhaps when you want to get drunk. Maybe when you want to go ride a bike. Maybe when you are going to class.
1. You guys ready to get small tonight?
2. Hey bra lets go grab some food; im so small right now.
3. Did you hear that new Senses Fail song? It's so small.