What is the meaning of Loaf?

A block of bread after baking.

Any solid block of food, such as meat or sugar.

Ellipsis of loaf of bread: the brain or the head.

A solid block of soap, from which standard bar soap is cut.

A particular still life configuration with seven living cells.

A catloaf.

↑ “loaf (of bread) n.”, in Green’s Dictionary of Slang, Jonathon Green, 2016–present

To headbutt

To do nothing, to be idle.

Source: wiktionary.org