
I BET she did and you didn't listen.
The Big Bang Theory Season 4, Episode 23

...but I BET they look like this...
The Big Bang Theory Season 8, Episode 22

I'm not gonna BET
on whether I can get a boner.
Breaking Bad Season 3, Episode 12

I BET your mom
is really proud of you.
The Big Bang Theory Season 5, Episode 6

I'll BET you're an actress.
The Big Bang Theory Season 4, Episode 22