[walking dictionary] {n. phr.} A person highly knowledgeable in matters of […]

[walking encyclopedia] {n. phr.} A polymath; a person very well versed […]

[walking papers] or [walking orders] also [walking ticket] {n.}, {informal} A […]

[wallflower] {n.} A girl who has to sit out dances because […]

[want ad] {n.} A small advertisement on a special page in […]

[war baby] {n.}, {informal} A person born during a war. * […]

[warm the bench] {v. phr.}, {informal} To act as a substitute […]

[warm-up] {n.} A period of exercise or practice in preparation for […]

[washout] {n.} A dismal failure. * /As far as investments were […]

[water over the dam] or [water under the bridge] {n. phr.} […]