defeat or get the better of (someone) by being clever or cunning.
"the hero is invariably outsmarted by the heroine"
synonyms: outwit, out-think, outmanoeuvre, outplay, be cleverer than, steal a march on, trick, make a fool of, get the better
When someone trys to outsmart the Urban Dictionary it usually ends in failure. People commonly just mash things on their keyboard and look it up to try and see if it has no results. Little did they know I just looked for a definition of this and I won this little game.