Usually chat spams #LetPearlSwear when something they deem worthy of being cursed happens on stream. This is just for fun and games, as Pearl is a family friendly streamer and she will never heed our plea for her to swear.
But accidents happen...
Like in a stream of 'The Quarry'[1] where, while reading the game's sentences, she accidentally said a swear word. Chat of course noticed and #PearlFinallySwore, another hashtag, was thus born.