If you mean “scratch on the palm = asking for a drink”, that’s not a widely recognized or standard meaning.
In some very specific social circles or older “coded gesture” ideas, people sometimes claim certain touches signal things like “let’s go for a drink” or interest in meeting privately, but these aren’t universal or reliable. Most people won’t interpret it that way.
So if someone scratched a palm, it’s far more likely to be:
- casual flirting
- playful contact
- or just meaningless/accidental
Rather than a clear request like “let’s get a drink.”
If you’re trying to figure out what someone intended, the safest approach is to look at the bigger picture—eye contact, conversation, tone—or just ask directly instead of relying on hidden signals.