In-and-in

n. A game used in gambling, and played by three persons with four dice, each person having a box. In signified that there was a doublet, or two dice alike, out of the four; in-and-in, that there were either two doublets, or that all of the four dice were alike, which swept all the stake.

He is a merchant still, adventurer at in-and-in. B. Jonson.

(Breeding.) From animals of the same parentage. In-and-in, or in-and-in breeding. See BREEDING.