Green’s Dictionary of Slang

a euph. abbr., goodbye, that’s it, it’s all over.

1963		P. Tamony collection.
1995		H.P. Dunne Mooncusser 83: ‘AMF, baby,’ he said, and hung up. Adios Motherfucker to you, too, I said to myself.
2002		Michael Seaver ‘Could You Work in the ER?’ 🌐 You mutter ‘AMF’ (adios my friend) to an obnoxious patient leaving. You associate possible paint colors with body secretions or functions.
2008		A. Zullo Golf is a Funny Game 10: ‘Pardon me, Judge [...] but just what does “AMF” mean?’ The prim and proper jurist turned to Cohen and replied simply, ‘Adios, motherfucker’.
2020		D. Whish-Wilson Shore Leave 25: Alpha Mike Foxtrot. Adios, motherfuckers.