Past tense of tip; inclined, tilted, or given a gratuity; having an end or edge treated with something.
From Middle English tippen, possibly from Old Norse typpa meaning 'to tip up.' The sense of giving money as a gratuity developed in the 17th century, possibly from the practice of 'tipping' one's hat as a gesture of appreciation.
The word 'tipped' beautifully demonstrates how physical actions become metaphors for social customs - from literally tilting something to the social ritual of showing appreciation with money. The connection between the physical 'tip' of something and 'tipping' with money reveals how language evolves through analogy.
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