This is a “This is fine” meme stamp. There is an arrow on the top part to indicate the stamp orientation.

You will need stamp ink (other types of ink might work) and a piece of sponge or felt (I used a furniture felt pad). You can get these at a local store or if you want to support me I get a small commission  if you buy from the following links:

Stamp ink: https://s.click.aliexpress.com/e/_c2u7luzp or amazon https://amzn.to/4da3OJt 
Felt pad: https://s.click.aliexpress.com/e/_c2z7HdZ5 or amazon  https://amzn.to/4tZgt9m 

Just print the stamp with the poop design facing up and print the cover with the opening facing up, no supports required.

For better results, after printing, lightly sand the the stamp face with fine sandpaper on a flat surface.