Posted on December 12, 2018December 13, 2019 by Idioms Poster Like a lamb down the river Dropped me in it – like a lamb down the riverLondon Bridge Pub punter. A mixed idiom made up from lamb to the slaughter, andsold down the river Source of this mixed idiom Heard at The Market Porter, London Bridge, London UK. Post navigationPrevious post: Variety is the spicey lifeNext post: You wanna get some UB40 on that