Word: 麻秆儿 (mágǎnr)

麻秆儿当梁，不是材料

mágǎnr dāng Liáng, bú shì cáiliào

Using a hemp stalk as a roof beam: not the right material

麻秆儿打狼，两头害怕

mágǎnr dǎ láng, liǎngtóu hàipà

Hitting a wolf with a hemp stalk: both sides are afraid

麻秆儿顶门，经不住推敲

mágǎnr dǐngmén, jīngbúzhù tuīqiāo

Propping a door with a hemp stalk: can't stand pushing and knocking