Х-33

ЗАБЫВАТЬ/ЗАБЫТЬ ХЛЁБ-СОЛЬ чью, какую obs, disapprov VP subj: human usu. this WO to show a complete lack of appreciation for s.o. 's hospitality and an unwillingness to reciprocate his kindness

X забыл Y-ову хлеб-соль = X repaid Y's kindness (hospitality) with ingratitude.