smooth brain- it is someone that is an idiot. this means that the more ripples you have on your brain, the smarter you are. So in conclusion, if you got a smooth brain then you are a dumb ass.
1.Jim sucks at chess he is such a smooth brain
2. Jim: HOWDY Y'ALL! Darry: pfft smooth brain Bryson: what a dumbass
Someone who is always there, and with everyone, a social butterfly, but never loses his cool, just plays it smooth more than all the time. So much so he/she is cool 39/24 hours per day.