Circular file

Put it in the circular file. She put it in the circular file. I think it went in the circular file.

This phrase refers to the trash can, and is often used in office settings.

Other terms related to "trash can" are "waste basket", "waste paper basket", and "garbage can". You can also just say "trash" or "garbage."

He threw it in the trash. It's in the garbage.

"Trash can" and "trash" are more common.

"Threw it away" is also extremely common, and "threw it out" is sometimes used.

She threw it out. Please throw this away.