No big deal.

Someone recently asked me what I thought my most common used phrase is, after careful deliberation I've come to the conclusion that it may be

 'Don't worry about it"

For example:

"Jessie, why aren't you wearing pants?" 

"I decided shear tights were adequate snow weather, Don't worry about it"

or

"I'm going to quit college and become a street performer, Don't worry about it"

or

"See that random boy of there we don't know? He's my future husband, we're getting married, don't worry about it"

and

"Jessie..... what are you doing?" 

"Don't worry about it"

I've found ultimately it generally causes great worry in people.