"Waka-jumping" is a slang term that means to switch sides or change one's allegiance frequently, especially for personal gain. It is often used to describe a person who is disloyal and opportunistic, and who is willing to abandon their principles or beliefs for their own benefit.
For example, if someone is known for supporting one political party but suddenly switches to another party just because they think it will benefit them, they can be described as a "waka-jumper." Similarly, if someone is known for supporting a particular sports team but suddenly starts supporting their rival team just because they are winning, they can also be called a "waka-jumper."
Overall, "waka-jumping" is a negative term that is used to describe people who are not trustworthy or loyal, and who are willing to betray others for their own benefit.
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