Took the short bus to school – She took the short bus to school.
Missing brain cells – They are really missing some brain cells.
Not the brightest bulb in the box –– The man on the phone is not the brightest bulb in the box.
Missing gray matter – Some people are missing gray matter.
Not paying with a full deck – The people at store are not playing with a full deck.
½ a loaf – Some people only have a ½ a loaf.
½ baked – That man is ½ baked.
Inbreeds – The people of that town are inbreeds.
Doozy – That man is a real doozy.
½ a brain – Those people have only ½ a brain.
Ding-bat – I do not like to talk to ding-bats.
Brain dead – Some people are just brain dead.