(US, automotive) Part of the exhaust pipe of a car that dampens the noise the engine produces. / A silencer or suppressor fitted to a gun. / A type of scarf.

A piece of farm machinery, usually towed behind a tractor, used to spray liquified manure on fields

Slimy mud, sludge. / Soft (or slimy) manure. / Anything filthy or vile. Dirt; something that makes another thing dirty. / Grub, slop, swill / (obsolete, derogatory) Money.

To shovel muck. / To manure with muck. / To do a dirty job. / (poker, colloquial) To pass, to fold without showing one's cards, often done when a better hand has already been revealed.

Any of the fleshy fruiting bodies of fungi typically produced above ground on soil or on their food sources (such as decaying wood). / A fungus producing such fruiting bodies.

Having characteristics like those of a mushroom, for example in shape or appearance, speed of growth, or texture.

(intransitive, figuratively) To grow quickly to a large size. / To gather mushrooms. / To form the shape of a mushroom.

(archaic) Easily fooled, gullible.

A large cup for beverages, usually having a handle and used without a saucer. / (slang, often derogatory) The face. / (slang, derogatory) A gullible or easily-cheated person.

(transitive, obsolete, UK) To strike in the face. / (transitive) To assault for the purpose of robbery.