Pin-drill

(Mech.), a drill with a central pin or projection to follow a smaller hole for making a larger hole, sinking a recess for the head of a bolt, and the like. — To drink at pins, to drink from a cup marked with pins, with a view to leave the liquor at the exact height of one of the pins; hence, a merry pin, a merry mood. “He was accounted the man who could nick the pin, drinking even unto it, whereas to go above or beneath it was a forfeiture.” Fuller.