From Longman Dictionary of Contemporary Englisha hard left/righta hard left/righta big turn to the left or right, for example when you are driving SYN sharp → hard
Examples from the Corpus
a hard left/right• More often, though, they miss, hang a hard left, and return to the dugout.• Sharp took an eight count after taking a hard left hook.• Still not enough to justify this desire to reach across the table and deliver a hard right to the gubernatorial chin.• I executed a hard right turn, but could not see any other aircraft in my vicinity. 