Green’s Dictionary of Slang

an intensifying sfx, used in comb. with an adj., e.g. correctamundo.

1970s		Happy Days TV series [TV script; passim] Correctamundo.
1989		F. Moss Teenage Mutant Ninja Turtles 14 Nov. [TV script] michaelangelo: (to Leonardo) Hey, dude, what goes quack, quack? leonardo: A duck? michaelangelo: Exactamundo!!
1994		Tarantino & Avery Pulp Fiction [film script] jules: Come on Yolanda, what’s Fonzie like? yolanda: Cool? jules: What? yolanda: He’s cool. jules: Correctamundo.
2002		C. Bennett and J. Gottesfeld Flight (Smallville Series for Young Adults, No. 3) 🌐 ‘You bought a parrot?’ Clark guessed. ‘Wrong-amundo. Whitney gave it to me.’.
2004		(con. 1960s–70s) McLeary & McLeary Hippie Dict. 167: exactamundo exactly.