Off the peg British adjective
Clothes are manufactured in large quantities and standard sizes, not made specially for a particular person.
I'm broke, so I will buy an off-the-peg outfit for the party next week.
I think you should have the tailor make a suit rather than wear an off-the-peg one for your wedding.
You can buy an off-the-peg bed to save money and time.
If you swallow the bait, you take something that someone offers you, or agree to do something that someone asks you to do without knowing that it is a trick or way of getting something from you.
You can't just do whatever he wants you to do. Don't swallow the bait.