Walking or standing really close to someone you don't know who has an umbrella when its raining and you don't have one. Done in a casual way to piggy back on their umbrella without them noticing that's what you're doing.
"My friend forgot his umbrella today and i noticed him rain ghosting different people all day to keep from getting wet."
by BSWSG December 16, 2009
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Rain Ghosting
• rain
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• rain dog
• Rain World
• Rain Delay
• rain bird
• Rain Boots
• rain box
• rain drop drop top