No one says that either. I have legit never heard "glac" or "vap" until you two.
eh you have to be around "pokemon furries" a lot to hear the shortened words they use
A lot of people I know / see in the sites say "vap" for vaporeon, but for the other eeveelutions except for jolteon, they say the full name or just say "eon" lol
Poll