prolite

Prolite is the form of politeness that is only warranted when the actor must maintain a spirit of professionalism. It's that special version of polite that service sector employees are forced to give to terrible people who decided to walk into their store on that day

Portmanteau of:
professional + polite = prolite

Hairdressers are often forced to be prolite to excruciatingly awful customers

by Kly August 14, 2015