A "womb tattoo" or "sexual demon tattoo" typically refers to a tattoo design often placed on the lower abdomen, near the pubic area. It commonly features a stylized heart or womb motif, often merged with tribal tattoo elements. The design may have associations with themes of sexuality, promiscuity, or fertility, and in certain contexts, it symbolizes a lustful or erotic nature. Some interpretations link it to a metaphorical "curse" of desire or lust, where it can be seen as a visual emblem of promiscuity or a sexual allure that invokes strong emotions.

The term "lewd crest" refers to the same tattoo but with a more explicit connection to ideas of sexual freedom or promiscuity, often carrying a stigma or a provocative connotation in certain subcultures. This type of tattoo is sometimes sensationalized in online or niche communities with supernatural or demonological associations.