The most common meaning is a derogatory term for a young woman who is considered unattractive, unsophisticated, or even unintelligent. This usage is highly offensive and should be avoided.
It can also be used as a general term for a woman who is seen as being unattractive, unstylish, or lacking in good taste. This usage is still offensive but may be less overtly aggressive than the first meaning.
In some circles, "goonette" can be used as a playful or self-deprecating term for a woman who enjoys drinking alcohol. However, this usage is not widespread and can still be considered offensive by some.
Overall, "goonette" is a derogatory term that should be avoided. If you're unsure whether a word is offensive, it's always best to err on the side of caution and choose a more respectful alternative.