
It's how they lure you in.
I believe it's called "BAIT and switch."
The Big Bang Theory Season 4, Episode 3

using a bull's head for BAIT.
Vikings Season 1, Episode 2

Cinnamon is chick BAIT.
The Big Bang Theory Season 12, Episode 23

One of us has an anxiety attack
and you only think that you're a BAIT.
Money Heist Season 1, Episode 4

We're BAIT. They're using us as BAIT.
Money Heist Season 1, Episode 4