Like a milking STOOL,
my case rests on three legs.
The Big Bang Theory Season 3, Episode 16
a bar STOOL dipped in cholera?
The Big Bang Theory Season 5, Episode 2
...and offers one to the empty STOOL
next to him.
The Big Bang Theory Season 2, Episode 19
Now I can quit checking my STOOL.
The Big Bang Theory Season 8, Episode 2
and "Uh-oh, red STOOL from
beets leads to cancer scare."
The Big Bang Theory Season 5, Episode 6