Pronunciation: [kˈɪsɪŋ ˈɒf] (IPA) 
The phrase "kissing off" is spelled phonetically as /kɪsɪŋ ɒf/ with the "kissing" part pronounced as "kiss-ing" with a short "i" sound and the "off" part as "awf" with a long "o" sound. The term "kissing off" is a slang term meaning to reject, dismiss, or end something in a forceful or abrupt manner. It originated in the early 20th century and is still commonly used in informal conversation.
Kissing off is an idiomatic phrase that is predominantly used in informal and colloquial speech. It is typically employed to describe the act of dismissing or disregarding something or someone in a casual or disrespectful manner. The term "kissing off" can be understood as an expression of nonchalance or indifference towards a particular situation, entity, or person.
Often associated with a sense of frustration, annoyance, or anger, kissing off can involve abruptly ending a relationship, disregarding someone's feelings, or dismissing the importance or relevance of something. It carries a connotation of disregarding or dismissing a matter without due consideration or concern.
In everyday usage, the term can be applied to a range of situations. For example, someone might say they are "kissing off" their job after encountering continuous frustrations or disappointments, expressing a desire to quit or let go without further regard. Another instance could involve someone "kissing off" their responsibilities, implying a lack of seriousness or commitment to fulfilling a particular obligation.
Overall, the expression "kissing off" is commonly employed to convey a sense of dismissiveness, either as a response to frustration or as a careless attitude towards a situation, person, or responsibility.
The term "kissing off" is a colloquial phrase whose etymology is not well-defined. It is derived from the verb "kiss" and the particle "off", but its specific origin is unclear. The phrase emerged in the United States in the mid-20th century and is commonly used to indicate dismissing, disregarding, or ignoring someone or something. Although the exact history of the phrase remains uncertain, it has become a part of informal language and is often used in casual conversations.
