No, it's the accepted CONVENTION.
The Big Bang Theory Season 2, Episode 21
- Really?
- Yeah. I was at a science-fiction CONVENTION...
The Big Bang Theory Season 8, Episode 20
So, you'll go to the Doctor Who CONVENTION
with me next week?
The Big Bang Theory Season 9, Episode 12
Yeah, it's a dinky little CONVENTION
where they sell collectibles
The Big Bang Theory Season 10, Episode 6