adjective/ˌuniko i deteɾˈxente/
distinctive, singular, extraordinary, especially in a quirky manner
“Mirenme, soy única y detergente, nadie me entiende, me encanta la pizza y los gatos, me gusta Nirvana, Harley...” — Look at me, I'm uniquely quirky, no one understands me, I love pizza and cats, I love Nirvana, Harley...
Literally, “unique and detergent”. Modification of the phrase único y diferente (“unique and different”), with detergente (“detergent”) replacing diferente for comedic purposes. The term was popularized in 2016.