Sexton Blake(redirected from a Sexton Blake)
slang A counterfeit. The phrase comes from rhyming slang in which "Blake" rhymes with "fake." (Sexton Blake is a fictional British detective.) Primarily heard in UK. Don't be too impressed—I know for a fact that her bag is a Sexton Blake.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.