The word "testy" has been employed in literature to vividly convey irritability or a tendency toward ill humor, often painting a picture of cantankerous or bad-tempered characters. In some texts, it is used to underscore the severity of a character's disposition—as seen when Brontë humorously describes someone's peculiar habits as "testy crotchets" [1], or when Burns lists it among other descriptors like "vicious" and "bad-tempered" [2]. It also appears in works of satire and farce; for instance, Rabelais equates being "testy" with the irritable nature of an old cook in a comical reflection on human temperaments [3]. The term extends beyond human subjects, as illustrated by its use in describing "testy gamesters" in Pushkin's narrative [4] and even a testy hog in La Fontaine’s fable [5]. Its versatility is further showcased by nuanced character interactions in Brontë's works, where a person can be both irritable with servants yet gentle with others [6], and even spark curiosity about the reasons behind someone's testy behavior [7].