An individual (usually a man) who, while talking to his friends; can't stop bringing up his desire to have natural and/or unnatural sex, either explicitly or through insinuation, no matter what the conversation is all about.
An ironic euphemism for the word horny, which means someone desperately wants to have sex, or wants to feel sexual pleasure. Sometimes, when the word horny is a little too much in some contexts, stick with the word hornful.