I want to drop my goody goody rep. Anyone help?

So everyone kinda thinks of me as that good girl who always gets good grades and stuff and never gets in trouble. I dont want to do anything super bad and its not like my grades are amazing theyre like all b+s and stuff so idt that dropping my grades will help but i rele want to drop the good girl thing. Any ideas. Im thinking changing my style or something but idk. Thx xD