
...I BET she had sex...
The Big Bang Theory Season 3, Episode 17

But you know, I BET...
I BET when I do it,
The Big Bang Theory Season 7, Episode 2

And the Iron Bank
wants to BET on a winner.
Game of Thrones Season 7, Episode 3

And I'll BET lesbians love Bluetooth.
The Big Bang Theory Season 2, Episode 18

I BET he's someone from Babylon 5.
We're never gonna get it.
The Big Bang Theory Season 2, Episode 21