
Well, then, BUCKLE up.
You're in for a cranky night.
The Big Bang Theory Season 8, Episode 20

It said right there on the invitation,
"Buckle up for fun!"
The Big Bang Theory Season 10, Episode 19

Ooh, look, a new Batman belt BUCKLE.
The Big Bang Theory Season 2, Episode 20

It's a lightsaber
belt BUCKLE.
The Big Bang Theory Season 7, Episode 7

All right. Let's BUCKLE down and work.
The Big Bang Theory Season 3, Episode 4