A figurative relative who comes to visit when you vomit. Similar to Aunt Flo.
DeSean: "How did last night go? Did you get it on with LaShawna?"
LeSean: "Nah man, hit the booze too hard and ended up getting a visit from Uncle Ralph."

Sean: "Dude, did you read Ralph Waldo Emerson's classic 'The American Scholar'? That shit is monkey-fighting LEGIT! In da hizzouse!"
Shawn: "Psssht! More like Uncle Ralph Waldo Emerson! That guy was a total clown. I don't think I could get through a paragraph of his writing without losing my lunch. I'm more a fan of some of the modern-day philosophers like Rebecca Black, who tackles more relevant issues like which seat is best to occupy in a vehicle, or Aaron Carter, who explores the division of dreams and reality in his great work 'That's How I Beat Shaq.'"
Sean: "Dude. No."
by Nicholas D November 9, 2011
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He is a typical weird, fat, smelly, jobless, homeless guy with a super long beard. He normally visits your house with food stains all over his shirt. He also is definitely on drugs. Stay away from your Uncle Ralph unless you want to be kid-napped and fed to some bears in the forest.
Mom: "Your Uncle Ralph is coming over today."
Kids: "NOOOOOOOOOOOOO!!!!"
by theonecalledbella May 28, 2020
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To noisily projectile vomit.
That mystery meat from the cafeteria was so bad, I had to visit Uncle Ralph.
by postmachoguy January 20, 2009
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