A person that has a lack of common sense.
May be expressed as " not the brightest bulb on the christmas tree"
Ex) What a "tater tard" she just passed out on the urinal !!!
Carl: O wut securities coming, your done
Ferg: No, way ill just say this is my cone baby
Carl: You tater tard that won't work
Ferg: I got over the fact my baby's got a cone head he should too!
All people in scary movies that walk toward the presence of imminent danger
Your friend you just said wasn't the sharpest tool in the shed