It would seem that as generations change so does our vocabulary.
Here are some words I remember as a child that have disappeared from our everyday conversations.
Brassiere, Basin, Bellboy, Footstool, Jukebox, Nylons, Record Player, Steward, Stewardess, Stockings, Swish Broom, Telephone, Washboard, and Girdle.
These are expressions: Whatchamacallit, Thingamabob, My Guy, Can You Dig It, Thingamajig, Morlocky, Alphabet telephone exchange (AU1-5611)
I'm sure there are a lot more. If you can remember any please leave them in your comments.