![](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
"Koo" from Koothrappali
and "PER" from CooPER.
The Big Bang Theory Season 9, Episode 12
![As per your suggestion,
we're hanging out.
As per your suggestion,
we're hanging out.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
As PER your suggestion,
we're hanging out.
The Big Bang Theory Season 4, Episode 5
![You and I split
$2,000 per ounce.
You and I split
$2,000 per ounce.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
You and I split
$2,000 PER ounce.
Breaking Bad Season 2, Episode 5
![Per our roommate agreement,
kindly refrain from raucous laughter...
Per our roommate agreement,
kindly refrain from raucous laughter...](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Per our roommate agreement,
kindly refrain from raucous laughter...
The Big Bang Theory Season 4, Episode 24
![He was so busy figuring out
how many parts per million of urine...
He was so busy figuring out
how many parts per million of urine...](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
He was so busy figuring out
how many parts PER million of urine...
The Big Bang Theory Season 8, Episode 9