【喻】【贬】经手买东西时暗中克扣钱款为己有（一般是少量的）。买啲咁多嘢佢都要打斧头嘅。（买一丁点儿东西他也要揩油。）

(phrasal verb) to get a rake off by secretly pocketing the part of the money that is meant for a specific purpose or the earnings from a transaction