Origin of nitpickback-formation from nit-picking
Nike Boutique Winter Boutique Shorts Winter Athletic zWvUFqTwa6nit·pick
verbnit·picked, nit·pick·ing, nit·picks
(third-person singular simple present nitpicks, present participle nitpicking, simple past and past participle nitpicked)
From Leggings Crew Leisure Boutique Leisure Boutique Leisure Boutique J Crew Leggings J FvFncgPx +"Ž pick, originally referring to literally removing invisibly-tiny louse eggs by hand.