The meme label refers to Dexter Morgan, the central character of the television series Dexter, which premiered in 2006 and stars Michael C. Hall. Online creators use “rizz” as shorthand for romantic charm or flirting ability, often ironically. Combining that slang with Dexter creates humor by recasting his controlled, watchful demeanor as smooth confidence. The precise episode, dialogue, or musical source of this particular upload is not confirmed, but the format continues to circulate through character edits, reaction videos, and short-form meme posts.