It's possible you've misheard or misremembered a similar idiom. Perhaps you're thinking of something like:
* "Corked up" - This refers to someone who is being secretive, holding back their emotions, or generally not behaving normally.
* "Bottled up" - This describes someone who is suppressing their emotions and not expressing them.
If you can provide more context about where you heard this phrase, I might be able to help you figure out the intended meaning.