A-OK /ˌeɪ əʊˈkeɪ $ -oʊ-/ BrE AmE adjective American English spoken informal
[ Date: 1900-2000 ; Origin: all (systems) OK ]
in good condition SYN satisfactory :
We took the car in for a check, and it was A-OK.
—A-OK adverb :
Everything’s been going A-OK since Jack got home.