Take a quick peek at the Twitter feed from George Takei — the actor famous for his Star Trek and advocacy roles, and the star of the new documentary To Be Takei — and it's immediately clear that he has a catchphrase.
He uses it in a sentence:
He uses it as a hashtag:
He even has his own link shortener, which churns out catchphrase-inspired short URLs for him to tweet:
But how did "Oh my!" come to be his catchphrase? Here, Takei tells TIME.