(transitive, informal) To add something extra free of charge. / (transitive, informal) To include in a calculation. / (idiomatic) To quit, to fold. / (transitive, archaic) To inject, as a fluid.

plural of ball in hand

In billiards, a circumstance in which a fault by another player, such as a scratch, permits the competitor to take the cue ball in hand and place it anywhere on the table.

simple past tense and past participle of tune in

Eventually, finally. / After a thorough examination of the situation

Alternative form of throw-in

(transitive) To keep (livestock) indoors during harsh weather.

plural of parent-in-law

(informal) A small, agile group of startup innovators with a big idea, passion, and modest resources.

(idiomatic) To try or guess at something without having any knowledge about the subject.