That's flattering to a chance acquaintance, but a hard knock at your friends.
I've been fighting against you all these years, and many a hard knock we've had.
"He got a hard knock after we met the Brimsteads," said Sarah.
Be jabbers, it's a hard knock you have had, and a mighty lot of blood you must have lost!
At this moment the postman's hard knock at the door nearly made ...