He thinks he's such a mucky-muck, always bossing everyone around.

He went through the muck and bullets to complete the mission.

The muck flies were buzzing around the barn.

I saw a muck fly buzzing around the garbage bin.

I saw a muck-snipe in the marsh.

I saw a flock of muck-snipes flying overhead.

He ran a muck through the crowded streets.

Where there's muck there's brass.

He thinks he's such a high muckety-muck, but he's really just a regular employee.

Muck-up days are a tradition in many high schools where students play pranks and have fun before graduating.