kisser
Word family
Synonym discussion
Sense: noun/1
A "good kisser" is someone whose kissing technique is pleasant, while "romantic partner" is a much broader term for a person you are in a romantic relationship with — someone may be a wonderful romantic partner but not necessarily a good kisser. The phrase "smooth operator" is an older slang term for someone who is charming and skilled at romantic interactions, including kissing, but implies a degree of manipulation or insincerity. "Kisser" (with a modifier) is the most direct and natural way to talk about someone's kissing ability in casual conversation. For example: "I went on three dates with him. He was a great kisser, but not much of a conversationalist." versus "He was a smooth operator who knew exactly what to say and do."
Etymology
Formed by adding the suffix -er to 'kiss.' The earliest recorded use (early 20th century British slang) referred to the mouth — the body part that does the kissing. From there the meaning broadened to the face. The modern sense of 'a person who kisses' (a good kisser, a bad kisser) developed later in the 20th century as the word came to be used with descriptive adjectives.