A tool used in machining fields, especially milling, to aid in setup. It is a block of steel that is precisely squared and parallel whose sides are 2, 4, and 6 inches long, respectively. 2-4-6 blocks are a larger version of the more common 1-2-3 block.

Alternative form of have been around

Alternative form of knock someone's block off

(slang) To strike a person in the head, causing them to fall to the ground, especially in an unconscious condition; to beat up a person.

plural of chip off the old block

(communication) A device that amplifies a high frequency band of radio spectrum and converts it to a lower frequency used in satellite communications.

simple past tense and past participle of have been around the block

Third-person singular simple present indicative form of have been around the block

present participle of have been around the block

(nautical) A vessel that is deliberately sunk in order to block a waterway (to prevent it being used by an enemy)