The unglossed headword phrase is illustrated by both of the quotations given. (Its adjective is the neuter nominative/vocative/accusative (and masculine accusative) singular of oi(=os, -a, -on, such as, what sort, what kind; see LSJ s.v.) In the quotations the phrase has an idiomatic usage within a compound statement; see LSJ s.v. oi(=os V.4; different from the usage at omicron 987, omicron 988, omicron 990, omicron 991.
[1] Polybius 1.43.6 (web address 1), on an incident at the siege of Lilybaeum (nowadays Marsala, Italy, on the the west coast of Sicily; Barrington Atlas map 47 grid A3) in 250 BCE during the First Punic War (264-241). Mercenary officers under Carthaginian command quit the city, struck some deal with the attacking Romans, and then implored, to no avail, the rest of the defenders to surrender (Walbank, pp. 105-8; Scullard, CAH VII.2, pp. 560-1).
[2] An approximation of Polybius 3.82.5 (adding a superfluous ou): web address 2), which describes the aggressive pursuit of Hannibal (OCD(4) s.v, and alpha 2452) by popular Roman leader and consul Gaius Flaminius (d. 217 BCE; OCD(4) s.v. Flaminius(1), and phi 517) against advice from his officers to await reinforcing legions (Second Punic War, 218-202). Subsequently, aided by a fortuitous early morning fog, the Carthaginian devised an ambush at Lake Trasimene (present-day Lago Trasimeno; Barrington Atlas map 42 grid C2, cf. alpha 3856 and lambda 383); and there Flaminius was killed together with about 15,000 of his soldiers (Walbank, pp. 415-20; Briscoe, CAH VIII, pp. 47-9). [In her critical apparatus Adler notes that Polybius' text in fact reads tw=n a)pofainome/nwn: he could not bear the things they were putting forth.]