
I don't know what color LONELY is.
The Big Bang Theory Season 4, Episode 22

The LONELY guy
and the two happy couples?
The Big Bang Theory Season 4, Episode 22

Nothing rhymes with orange.
It's probably LONELY.
The Big Bang Theory Season 4, Episode 22

in a futile attempt
to pick up some LONELY postdoc,
The Big Bang Theory Season 7, Episode 1

So you're keeping busy, you're not LONELY?
The Big Bang Theory Season 10, Episode 24