1778 H. Brooke Antony & Cleopatra iv. iv, in II. 400 I know not why of late This yestiness of temper comes upon me.
1836 V. 405/1 It [sc. creamy scum] however rises again, becomes yesty, the bladders enlarge in size, the yestiness increases, and, when ready for cleansing, it has a vigorous, rich, yesty brown and bladdery head.