What does it mean for someone to look at you in a "smooth" way ?
Means they did not jolt left snd right they slowed there eyes to a smooth speed
It means the opposite of a rough way
Like he's all suave, and just looking at you like that will make you swoon!
probably means the person likes what they see.
to look casually
its means to look at you in a way that you wouldn't notice them looking at you. like maybe you walked by and they checked you out from behind and then they turned their head and acted like they totally didn't check you out