noun

• Someone who or something that pecks, striking or piercing in the manner of a bird's beak or bill
• (uncommon or regional) Any tool used in a pecking fashion, particularly kinds of hoes or pickaxes.
• (uncommon) Any machine or machine part moving in a pecking fashion
• (weaving, obsolete) A picker, a shuttle-driver: the device which moves backwards and forwards in the shuttle-box to drive the shuttle through the warp.
• (telegraphy, historical) A kind of V-shaped telegraphic relay.
• (zoology) A bird, particularly a member of the group including the woodpeckers, flowerpeckers, oxpeckers, and berrypeckers.
• (UK regional, obsolete) An eater, a diner.
• (UK regional) A bird's beak or bill.
• (chiefly US, regional, slang) A penis; cock, dick.
• (UK colloquial, by extension of the sense ‘beak’) A nose.
• (UK colloquial, by extension, from the expression ‘keep one's pecker up’) Spirits, nerve, courage.
• (US regional, historical) Clipping of pecker mill, a rice mill. [(US dialectal, historical) A kind of rice mill.]
• (zoology, usually colloquial or US regional) Clipping of woodpecker (Picidae). [Any bird of species-rich family Picidae, with a strong pointed beak suitable for pecking holes in wood.]
• (chiefly in the plural, derogatory slang) Short for peckerwood ("whitey; white trash") [(Southern US, Appalachia, slang) A woodpecker.]
• (chiefly in the plural, derogatory slang) Short for peckerhead ("dickhead; an aggressive or objectionable idiot"). [(chiefly US, derogatory) A dickhead: an unpleasant, stupid or mean person.]
• (US) Clipping of pecker head ("an electric motor's junction or terminal connection box, where power cords are connected to the winding leads").