It's a sports METAPHOR.
The Big Bang Theory Season 2, Episode 7
Luckily for you,
that's where the METAPHOR ended.
The Big Bang Theory Season 1, Episode 15
That was a beautifully written
penis METAPHOR.
The Big Bang Theory Season 5, Episode 1
Wow, was that your first ever
sports METAPHOR?
The Big Bang Theory Season 12, Episode 10
You know what? I'm thinking Howard
wasn't making a back-scratching METAPHOR.
The Big Bang Theory Season 2, Episode 16