pinpricking1
/ˈpɪnprɪkɪŋ/noun
1A pinprick; the action of pricking with a pin.
2 Figurative. A minor misfortune or irritation; petty and persistent goading or criticism.
Origin
Early 18th century; earliest use found in John Stevens (c1662–1726), translator and antiquary. From pin + pricking.
pinpricking2
/ˈpɪnprɪkɪŋ/adjective
That pricks like a pin; causing petty annoyance, irritating.
Origin
Late 19th century; earliest use found in Rosa Caroline Praed (1851–1935), novelist. From pinprick + -ing.