Pillow fight!
The Big Bang Theory Season 12, Episode 24
I'll get you a blanket and a PILLOW.
The Big Bang Theory Season 1, Episode 7
...and have naked PILLOW fights?
The Big Bang Theory Season 2, Episode 7
While I'm gone,
don't breathe on my PILLOW.
The Big Bang Theory Season 10, Episode 7
I'll hit you in the face with a PILLOW.
The Big Bang Theory Season 2, Episode 5