Oh what joy to hear Radio Amateurs mentioned in the same breath as serious radio operators!
Indeed, many RA spoken codes are derived from "old" CW communications and many of those were thought up by the CW ops themselves, with very little being laid down (similar to the language now being developed by txt users).
One well know "ham" phrase is "Hi", which is di-di-di-dit di-dit on CW and spoken as "aitch eye" or just "Hi". It means "laughter", which is difficult to convey on CW. I once unthinkingly said it to a helicopter pilot on R/T and he fell about - obviously a serious bloke!
Other similar codes include "73", as a sign-off meaning roughly "goodbye" and "88" meaning "love and kisses".