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Bobbsey twins

[bob-zee]
plural noun
  1. two people who are often together or seem to resemble each other, as in appearance or actions: We called them the Bobbsey twins, because they always had the same opinions.

Origin of Bobbsey twins

from the central characters in a series of children's books by Laura Lee Hope, pen name of a literary syndicate; some of the books are attributed to U.S. author Lillian C. Garis (1873–1954)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for bobbsey twins

couple, pair