thumbs up » thumps up
[Note added by Arnold Zwicky, 15 May 2006: Some of the attested examples are clearly just misspellings of “thumbs”: “This wonderful hitchhiking odyssey is all thumps up (or outstretched as the young boy would tell us).” (link) But among the many thousands of others are surely some in which “thumps” is intended to refer to either blows or noises made by thumping.]
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