Deku is the hero name of Izuku Midoriya, the main character of My Hero Academia, created by Kohei Horikoshi. The manga began in 2014 and the anime adaptation followed in 2016, building a huge global fandom around its young heroes in training. The nickname first started as a childhood insult meaning useless, then was reclaimed by Izuku as a positive name linked to the idea of trying his best. Short name callouts like this spread through anime edits, TikTok clips and soundboards because they are instantly recognisable even without visuals.