Foist, v. t. [imp. & p. p.Foisted; p. pr. & vb. n.Foisting.] [Cf. OD. vysten to fizzle, D. veesten, E. fizz, fitchet, bullfist.] To insert surreptitiously, wrongfully, or without warrant; to interpolate; to pass off (something spurious or counterfeit) as genuine, true, or worthy; — usually followed by in.
Lest negligence or partiality might admit or foist in abuses and corruption. R. Carew.
When a scripture has been corrupted... by a supposititious foisting of some words in. South.