
...that it is possible
for the matter above this STOOL...
The Big Bang Theory Season 2, Episode 19

Now I can quit checking my STOOL.
The Big Bang Theory Season 8, Episode 2

...her vomit and STOOL
became filled with blood...
The Big Bang Theory Season 6, Episode 18

and "Uh-oh, red STOOL from
beets leads to cancer scare."
The Big Bang Theory Season 5, Episode 6

...and offers one to the empty STOOL
next to him.
The Big Bang Theory Season 2, Episode 19