Define Slack-jawed Idiot Meaning

Slack-jawed Idiot
A lazy, shady character that's unconsciously incompetent.

He think's he's "the man", but everyone else sees him as being a fool.

Just look at mike! That slack-jawed idiot doesn't even have a clue!
By Flore
Slack-jawed Idiot
Anyone posing for a clickbait Youtube thumbnail.

By Coreen