肚皮

hǎo huà tián bù bǎo dù pí

好话填不饱肚皮。

The belly is not filled with fair words.

wǒ tīng dào nà ge xiào hua shí chà diǎn xiào pò dù pí

我听到那个笑话时差点笑破肚皮。

I nearly split when I heard the joke.