Stupid. Dumb.
Slow. Lacking
common sense. A person just smart enough to get themselves and those around them into serious trouble.
Earl was finished his day's work at the barn. So, he climbed up into the loft, flaked out on a few hay bails and lite a smoke.
Jeb, the
ranch owner caught him and said: "Earl! You
fool, put out that cigarette! ... They said you was
slow, but that's just plain stund!"