Alucinar literally means "to hallucinate". However, in modern slang, it's used to express that someone is amazed, impressed, or "tripping out" over something incredible.
In the song, the artist sings, "Las barbies se alucinan cuando me miran gastar" (The 'Barbies' go crazy when they see me spend money). It paints a vivid picture of people in a club being completely blown away by his lavish lifestyle, capturing the song's vibe of confidence and luxury.
"Igualito A Mi Apá" is all about carrying on the family legacy and flaunting a lavish, untouchable lifestyle. Fuerza Regida and Peso Pluma link up to brag about inheriting everything from their dad, starting right off with "Me regaló su Super con cacha dorada" ("He gifted me his Super with a gold grip"). The narrator moves through luxury nightclubs, blowing smoke and spending enough cash to impress everyone around: "Las barbies se alucinan / Cuando me miran gastar" ("The Barbie-like girls go crazy / When they see me spend"). He makes it clear that while he acts calm, he has heavy backup watching his back, warning troublemakers, or lacras ("scumbags"), not to mess with him.
Along the way, the track is packed with regional slang and luxury flexes. When he says "Chambeo en la capital" ("I work in the capital"), chambear is everyday Mexican slang for putting in work. He cruises in a white Suburban between Culichi (the local nickname for Culiacán) and La Humadera, flashing high-end brands with "los lentes son Prada" ("the sunglasses are Prada") and enjoying weed with "Me prendo un BackPack Boyz" ("I light up some BackPack Boyz"). His attitude boils down to the blunt shrug: "Porque el que puede, puede / Vivo lo que quiero, to' modos van a hablar" ("Because whoever can, can / I live how I want, they are going to talk anyway").