a smarty pants

a smarty pants

  (informal)
someone who is always trying to seem more clever than everyone else in a way that is annoying Cindy, the little smarty pants, will be the first to tell us where we went wrong.
See also: pant, smarty
References in periodicals archive ?
Greg is the only one with any passion, but he is too much of a nice guy to save the restaurant, he needs the help of his partners, but Brian would rather be home with his feet up, and David is too much of a smarty pants.
I did say when I signed him - and I'm not being a smarty pants - he would give us an edge in tight games to open up defences.
I did say when I signed him, and I'm not being a smarty pants, he would give us an edge in tight games to open up defences.
I can unearth gaps in structure, point to omissions and generally feel like a smarty pants.
Anne Robinson and Danny Wallace return with this epic quiz, giving you the chance to find out just how much of a smarty pants you really are.