1. Stupid. Careless.

2. A person evincing these characteristics.

A milder version of shit for brains.
1. "What a crap for brains thing to do."

2. "That crap for brains Bob left the oven on when he left for Jamaica."
by Famous Mortimer January 24, 2003
Get the crap for brains mug.
meaning ultra stupid,like their brains were taken out and replaced by crap;Strong Bad's fave saying
"Man,I knew you had Crap for brains,but your crap for brains has crap for brains"
by Ashley L January 9, 2004
Get the crap for brains mug.
Literally having shit in your skull, in place of brains.
Stu has shit for brains, that fools needs to FFIO.
by Hempknight January 25, 2003
Get the crap for brains mug.