一退六二五

一退六二五:

Literally means:

way of calculation by abacus

Actually means:

shirk one's responsibility

In the traditional Chinese way of calculating weight by 算盘 (abacus), if one Liang (50 gram) is divided by sixteen Liang, one will get 0.0625.

In this phrase, 退 is the phonogram of 推 in Chinese, meaning shirking the responsibility.

It figuratively means that someone refuses to take any responsibility in something he has been involved in. It is derogative in meaning.

在珠算斤两算法中，一两被十六两（一斤）除时，退去1，得出的数目是 0.0625斤。

其中的“退”是“推”的谐音，表示“推卸”。比喻把责任推的一干二净。具有贬义色彩。