zuò mǎ
trestle
carpenter's frame
hū niú zuò mǎ
to call sth a cow or a horse (idiom); it doesn't matter what you call it
Insult me if you want, I don't care what you call me.
zhǐ lù zuò mǎ
to take a deer and call it a horse (idiom); deliberate inversion of the truth
dāng niú zuò mǎ
to work like a horse and toil like an ox
fig. to slave for sb