"Who died and made you boss? or Who died and left you in charge?" is a term that might be applied to somebody who has over stepped the limits of their authority and started giving orders to those around them.
It means that the person is as important to you as is the entire world. You care for them as much or more than all of the wealth in the world. That they are your world and your interests revolve...
The phrase "mean mug" is usually found in literature.The word "mug" in this context is a slang word for face and the phrase "mean mug" is generally meant to convey a description of a face as cruel,...