Where the "chip" is referring to the son (or sometimes daughter), and the "block" is referring to the father (but seldom the mother). Meaning that the offspring heavily resemble their own parents. Also meaning that the son has acquired a characteristic from their father.
Hey Johnny, that's exactly what your Pop said! You're a real chip off of the old block, ya know that?
by Coffee February 27, 2005
Get the chip off of the old block mug.