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Definition of nose-picking in US English:
nose-picking
noun
The action of picking the nose, especially habitually.
adjective
Of a person: that picks the nose, especially habitually.
Origin
Early 20th century; earliest use found in The Kansas City Star. From nose + picking<br>1960s; earliest use found in Arthur Koestler (1905–1983), novelist and journalist. From nose + picking.
