You're killing me, Smalls
Line from the movie "The Sandlot," meant to show extreme frustration towards someone's ineptitude or clueless-ness, sometimes both.
"Last night's episode of American Gladiators was wicked?" "What's American Gladiators?" "You're killing me, Smalls!" "Johnson, did you back up those files like I asked" "Umm,no, sir. I forgot" "You're killing me, Smalls!"
By Bill so chill