1. Go full speed ahead, without holding back: This is the most common meaning. It means to give something your all, put maximum effort into it, and don't let anything hold you back.
* Example: "The band was really jamming, so the drummer let it rip on the drums."
2. Let something loose: This can be used in situations where something is being restrained or held back, and you're releasing it.
* Example: "The chef let it rip with a big burst of flavour from the pepper."
3. Express yourself freely: This is a more informal interpretation. It means to say or do whatever you want, without holding back your thoughts or feelings.
* Example: "After a long day, I let it rip at the meeting and told them exactly what I thought."
4. Let something fly: This can be used in a literal sense, such as throwing something.
* Example: "The kids were playing frisbee and let it rip across the park."
The specific meaning of "let it rip" will depend on the context of the situation.