A smirk is a smile that is smug and slightly offensive. People often smirk at you when they think they know better than you do.
A smock is a loose fitting garment often worn over something else, eg a paint smock.
Smock could also mean a garment made by smocking.
Someone is smug if they are very confident of their ability to do something, but at the same time are calm and complacent about it, as if they can do it very easily.





















