без сучка без задоринки {adv. phr.}
bez such'ka bez za`dorinki
Sth. that went off impeccably, smoothly, without any problems.
To do sth. without defects.
Тестирование продукта прошло без сучка без задоринки. — Product testing has been carried out (passed) without any problems (smoothly).
{Origin}
From the carpenters' and cabinetmakers' style of speaking. Initially, about the wood and timber of a high quality and thorough woodworking. Задоринка — roughness, a hook on the surface of a smoothly planed board. Literally — without any defects.
See also:
комар носа не подточит; без изъянов
it's just perfect; it's done to a T; there's nothing left hanging