> Absolutely no English speaker doesn't read 'PJs' as 'pyjamas'.

While I agree that “pajamas” is the most common meaning of PJs, there is a certain socio-economic class in the US in which “PJs” is used far more often in speech to refer to private jets than pajamas.

I’m a “language guy”, and it was a new one to me when I started spending more time around people who were referring to, and often users of, PJs.

While the person you were responding to took a crass line, their linguistic intent was very clear to me.