With a HINT of ammonia.
The Big Bang Theory Season 5, Episode 7
All right, give me a HINT.
The Big Bang Theory Season 7, Episode 7
I'll give you a HINT,
The Big Bang Theory Season 10, Episode 5
'Cause I'll give you
a HINT: it's already
The Big Bang Theory Season 12, Episode 21
Hint: it's based
on Sanskrit,
The Big Bang Theory Season 12, Episode 2