Always preferred "Boss" to "Sir" in the dim distant days gone by when I qualified for either epithet.
If only I'd paid more attention! Never could get the hang of sociable interaction - which is a shame because my time on 2 Sqn 2AFTS was extremely pleasant.
Having hung-up the bonedome for the last time in July, there is only one person I refer to now as The Boss - and she's telling me its time for my medication/ snooze/ lunch/ whatever (I still don't really listen).