Definitions by @_OneForAll_____

Deku Kin

Someone in real life that behaves or is exactly like Deku from MHA/BNHA

Carlos is a Deku Kin, he is exactly like Deku in every way!

Someone who is a big fan of Izuku "Deku" Midoryia from MHA/BNHA

Carlos is a Deku Stan. He really is a big fan of Deku!