A thirst trap is a type of social media post, usually a photo or video, that is intended to entice viewers sexually. The term "thirst" refers to sexual frustration, which is likened to dehydration, implying desperation. The phrase "thirst trap" originated from selfie culture, and its usage has increased with the rise of social media platforms such as Snapchat, Instagram, and online dating apps like Tinder. Thirst traps are often posted to seek "likes" and comments on social media, which can provide a temporary boost in self-esteem and validation. They can also be a way to express sexuality, contribute to personal branding, or cope with emotional distress, such as after a breakup.

Thirst traps can feature a variety of body parts, such as bulges of male genitalia, breast cleavage, abdominal muscles, pectoral muscles, backs, and buttocks. They are often accompanied by a caption. Thirst traps are always clearly posted or sent for the attention and admiration of one or more people, but are often done coyly enough that they are more flirty than explicit.

To take a thirst trap, one might put on the perfect outfit and give their look some extra oomph, or they could go for an "effortlessly hot" effect, such as golden hour lighting, being fresh off the beach, a post-workout selfie, or a "no-makeup" makeup look. However, more than anything, a thirst trap is all about being confident and authentic.

In summary, a thirst trap is a type of social media post that is intended to entice viewers sexually, often featuring body parts and accompanied by a caption. They are posted for the attention and admiration of one or more people, and can be done coyly enough to be more flirty than explicit.