Flypaper (noun)

1. A sticky paper used to trap flies and other flying insects.
2. A metaphor for something that trap or ensnare, similar to how flypaper traps flies.

Origin:

From the combination of the words "fly" and "paper" meaning a paper coated with a sticky substance used to trap flies.

Examples:

1. The flypaper hanging in the kitchen was covered in dead flies.
2. He had fallen for a scheme that was nothing more than flypaper for the gullible.
3. The flypaper was placed near the window to catch the flies.
4. The flypaper was changed every week to keep the flies from breeding.
5. He was just another fly caught in the flypaper of her charm.