Basically mood with the Sh sound the "Sh" before words trend came from Bobby Shmurda & his crew (GS9) like Shmoney.

When you are describing something that you can really relate to so it’s a big mood basically.

Combination of hood and mood to make one word (Street code)

To flater sarcastically

being in a weird mood

Whenever you’re not in the mood to say mood and you’re slumped and just say shmood.

like a more exaggerated “mood”. Like if saying just mood isn’t enough, you go ahead and say shmood. Also commonly used by people that pretend they’re depressed for attention, people that love downgrading themselves, and people that want to seem like they hate their entire lives even if they’re rich and white.