The definition of self serving is a person or action done only for one's own benefit, sometimes at the expense of others.
An example of self-serving is a lie told to make yourself look better.
serving one's own selfish interests, esp. at the expense of others
- Serving one's own interests, especially without concern for the needs or interests of others.
- Exhibiting concern solely for one's own interests: a speech full of self-serving comments.
(comparative more self-serving, superlative most self-serving)
- Said of people, attitudes, perspectives, etc.