block

a chip off the old block: seechip.

a new kid on the block a newcomer to a particular place or sphere of activity. informal

☞ This phrase was originally American: the block referred to is a block of buildings between streets.

2013PC World Chrome OS, developed by Google, is the new kid on the block. It's a Web-centric platform that basically makes the browser itself the operating system.

have been around the block a few times (of a person) have a lot of experience. North American informal

knock someone's block off: seeknock.

on the block for sale at auction. chiefly North American

☞ The block in this phrase was the platform on which, in former times, a slave stood to be auctioned.

put the blocks on prevent from proceeding.

☞ A block of wood or other material placed in front of a wheel prevents forward movement.

put your head (or neck) on the block put your position or reputation at risk by proceeding with a particular course of action. informal

☞ This phrase alludes to the block of wood on which a condemned person was formerly beheaded.