Don't let it bother you; put it out of your mind.
I don't want to continue with this conversation (usually used in frustration or anger).
It doesn't matter.
A conventional reply to an expression of gratitude.
Absolutely not; I forbid it or it is impossible.
The act of one who trifles; frivolous behaviour.
Of suspicious character, typically secretive or deceitful; shady.
Trivial, or of little importance.
Idle or frivolous.