a way to tell someone you aren't doing something they ask OR telling someone to go fuck off and get away from you, essentially another way of telling someone to go kick rocks.
timmy: yo johnny how bout you stop by kwikmart and get me a sixer of miller lite before you go to danielles?
johnny: uhh how bout you go climb some boulders.
Mom: hey son can you do your laundry and clean the dishes since i let you live here for free
Son: go climb boulders bitch