A word mistakingly used by a nervous and near-stuttering boy when in the presence of a really attractive girl. Describes something that is funny, hilarious, cute, etc. Often used just for fun or by girl to tease boy.
Boy: "Wow that movie we saw was so funty"
Girl: "You're right! And I think you're cute"
Boy: "Well then I think I love you"
Girl: "That is funty but I love you too"