Akademik

Л-157
ЛЫКОМ ШИТ (ШИТЫЙ) co// AdjP subj-compl with бытье (subj: human, pres only) one is unpolished, uneducated, uncultivated
X лыком шит - X is a (country) bumpkin (a hick, a yokel)
X is cut from simple cloth (in limited contexts) X was brought up in a barn.

Большой русско-английский фразеологический словарь. — М.: ACT-ПРЕСС КНИГА. . 2004.