
SAD man!
The Big Bang Theory Season 12, Episode 12

Well, what a SAD state of affairs.
The Big Bang Theory Season 9, Episode 23

I'm SAD for real now!
The Big Bang Theory Season 7, Episode 4

Oh, guys, this is really SAD.
The Big Bang Theory Season 7, Episode 14

but-but you're-you're drunk
and SAD and feeling lost...
The Big Bang Theory Season 7, Episode 12