The term "304" is used to refer to a promiscuous woman or sex worker. It is derived from the act of typing the number 304 into a calculator and then turning it upside down, which is supposed to resemble the word "h*e" or a slang word for the profession. On TikTok, the term is used as a code word to discuss taboo or adult-themed topics, and it is primarily used by women themselves and does not seem to carry a negative connotation