[Donbue]

In the not too distant past these were called ‘cement overshoes’ and used by the mob to eliminate the problem of a body being bouyant.

[Ciaphas Cain]

In the not too distant past these were called ‘cement overshoes’ and used by the mob to eliminate the problem of a body being bouyant.

Or as Scotty referred to them in that episode of Star Trek, "concrete galoshes".

[cyclotic]

A few years ago some divers in a Detroit waterway found a concrete block with two skeletonized legs sticking out of it. They couldn’t determine if they were from the mob days or more recent.