if someone is a bella then they go to sleep at 4pm and wake up at one in the morning and they have frequent mood swings and they suck at fortnite and was ran over by a raindeer
When a character in a fan fiction or a TV show or book (or something) acts like Bella Swan from the ever so popular book and movie Twilight. Usually refers to when a character is getting overly depressed over their lover leaving them or when someone is acting really clumsy.
Being a Bella is to be clumsy and/or use an unnecessary amount of 'umm's and 'ahhs'. Originates from the books/movies The Twilight Saga by Stephanie Meyer and refers to Bella Swan.
Person 1: "Did you see Hannah earlier? She fell on the stairs."
Person 2: "Hannah's always falling over. She's such a Bella"
OR
Person 1: "I just- I- ummmmm- I need- ahhh- I just want to *gasp*"
Person 2: "Stop being a Bella and just spit it out!"
Being paticualry clumsy or saying 'ahh' and 'umm' more then is necessary. Originates from the clumsey stuttering mess that is Bella Swan in the Twilight Saga.