When you spent money on something you didn't intend to buy, your top lip extends beyond your bottom lip.
After work my girl asked to stop for a drink, on her, when the bill comes she says she forgot my wallet so I top lipped and paid.
by BobaFett February 25, 2015
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Something that does not exist.

Jimin’s top lip is covered with concealer to appear nonexistent.
Army: Did you know Jungkook has a pet fish?
Other Army: That fish is as real as Jimin’s top lip.
by taehyung’s dog January 7, 2021
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