2 sentences for 坨 (tuó — classifier)

1. 草地上有一坨狗屎。

   cǎo​dì shàng yǒu yī tuó gǒu​shǐ.

   There is a pile of dog poop on the grass.

   Source: Dong Chinese Dictionary

2. 吃午饭的时候，一坨芥末酱滴下来弄脏了我的领带。

   chī wǔ​fàn de shí​hou, yī tuó jiè​mo​jiàng dī xià​lai nòng​zāng le wǒ de lǐng​dài.

   A drop of mustard fell and stained my tie during lunch.

   Source: Tatoeba