Boiler Suit

I came across the term in The Return of Lieutenant Boruvka . I pictured a guy in a stiff black suit, stiff because it had been boiled. Turns out it is simply the British term for overalls, or for a coat for a boiler building:

Thomas Heatherwick has completed Boiler Suit, an undulating facade of woven steel panels encasing the boiler house at Guy’s Hospital in London. (August 20th, 2007)

Update November 2016 replaced missing picture.