"When are roadways most SLIPPERY?"
The Big Bang Theory Season 2, Episode 5
so, I'm one SLIPPERY horror
ahead of you.
The Big Bang Theory Season 7, Episode 21
For the tenth time,
my mittens were SLIPPERY!
The Big Bang Theory Season 10, Episode 12
No. No, this is a SLIPPERY slope, Leonard.
The Big Bang Theory Season 6, Episode 9