گزارش خطا در معنی کلمه 'doesn't know his ass from a hole in the ground'

1 general:: Phrase(s): doesn’t know his ass from a hole in the ground [and] doesn’t know his ass from his elbow doesn’t know anything; acts ignorant. (Use ass with caution. Also with don’t. Don’t used with all persons is folksy.) • That teacher doesn’t know his ass from a hole in the ground. • She’s supposed to be an expert, but she doesn’t know her ass from her elbow.