Do all brits say "brilliant" all the time?

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I am contracting with a company here in the US that has a group that handles the UK goings on. These dudes are pretty funny (funny in a cool way since I like hanging out with them). By America standards they would be kinda goofy and well un-cool. But for some reason they seem like they would be the coolest in the UK. But anyway when ever you answer one of their questions instead of saying “cool” or “right on” or “fa sheezy” or something they say “Brilliant”. It cracks me up. Like he asked me where can he find the washroom (I guess thats bathroom), I told him over there. And he said “Brilliant”. Thats just way too funny. Actually got me saying it. :beam: . Is that like the slang word out there in the UK right now? Last month they had another one they were saying I forgot what it was.