as flat as a pancake

Meaning

1. completely flat

In the movies · 2

• It's back there now, flat as a pancake.A Simple Plan1998
• Also, we saw a coyote get run over by a 14-wheeler and left him flat as a pancake.Asteroid City2023

From the same entry

• and that's flat
• on your back
• in a spin
• on the flat
• fall flat
• fall flat on your face
• flat broke
• flat out
• in… flat