every day's a school day
Phrase that means the same as "you learn something new every day" - basically what someone says when the are told something they didn't know before.
Bloke 1: "You can carry something using wheels because carrying doesn't necessarily involve the item being held above the ground"
Bloke 2: "Whatever man! (lol) Every day's a school day!"
Bloke 2: "Whatever man! (lol) Every day's a school day!"