The word is Polish.
See? Look.
The Big Bang Theory Season 6, Episode 4
When I was a boy, I would
POLISH my Mee-Maw's silver.
The Big Bang Theory Season 5, Episode 21
Polish sausage!
The Big Bang Theory Season 6, Episode 4
Would you like me
to play some Polish music
The Big Bang Theory Season 7, Episode 23
...just to POLISH up
my spearfishing equipment.
The Big Bang Theory Season 1, Episode 15