Green’s Dictionary of Slang

(orig. US) wearing a dinner jacket.

1977		N.C. Heard When Shadows Fall 134: Louise and the girls in mink coats at the première, himself tuxed to the bone.
1999		Dr Dre ‘Light Speed’ 🎵 Introduced you to my Doggs, that don’t love hoes […] Fucked you up with my last video, tuxed up doin a tango.