马尾穿豆腐，提不起来

mǎ wěi chuān dòu fu , tí bu qǐ laimaweichuandoufu,tibuqilai

1. lit. like tofu strung on horsetail, you can't lift it
2. fig. let's not talk of this (pun on 提[ti2])

Study it in Yanamino