It is. They're what hold back
the URINE and feces.
The Big Bang Theory Season 8, Episode 18
passed out in a puddle
of his own URINE.
The Big Bang Theory Season 5, Episode 7
the URINE should just bead up
and roll right off.
The Big Bang Theory Season 5, Episode 21
It took me a gallon of URINE
to make that water.
The Big Bang Theory Season 5, Episode 15
that converts URINE
into drinking water.
The Big Bang Theory Season 5, Episode 15