smarty pants
Noun
Meaning
smarty pants (plural smarty pantses)
(informal) A smart aleck or know-it-all.
Synonyms: see Thesaurus:know-it-all
Alternative names
smarty-pants
Synonyms
brainiac
upstart
know-it-all
overconfident
parvenu
wiseacre
sciolist
know-all
name dropper
birkie
elitist
self-confident