Smurf-Fu is a skill learned by Smurfette from a book and put into practice by her in the 2021 animated series episode "Smurf-Fu". It is a variation of a human martial arts that requires precise movements to be effective. Smurfette first used it against a snake that had swallowed Brainy, Clumsy, and Dimwitty and forced it to expel the three Smurfs from its body. She tried teaching it to a bunch of Smurfs, but very few if any of them were able to match her level of expertise. The only time Smurf-Fu failed on Smurfette was when she tried to take on Bigmouth alone, as he just swatted her in mid-air when she tried to launch a kick attack straight to Bigmouth's face. This skill also appears in many other episodes in the series.
Smurfette usually wears a red suit when doing Smurf-Fu. This is a reference to Uma Thurman's yellow track suit from the Kill Bill film duology.
In The Smurfs: A Christmas Carol, Grouchy Smurf said that he had a blue belt in this skill.