(also loaf of bread) A block of bread after baking.
Any solid block of food, such as meat or sugar.
Shortened from "loaf of bread", the brain or the head (mainly in the phrase use one's loaf).
A solid block of soap, from which standard bars are cut.
To do nothing, to be idle.
(Cockney rhyming slang) To headbutt, (from loaf of bread)