Like a milking STOOL,
my case rests on three legs.
The Big Bang Theory Season 3, Episode 16
...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
...that it is possible
for the matter above this STOOL...
The Big Bang Theory Season 2, Episode 19
...her vomit and STOOL
became filled with blood...
The Big Bang Theory Season 6, Episode 18