mule

noun
1
an animal that has a female horse and a male donkey as parents, used especially for carrying loads
قاطر
2
a person who is paid to take drugs illegally from one country to another
حامل مواد مخدر, پیک مواد مخدر
a drug/drugs mule
The authorities believe these men are important figures in the drug trade, not merely mules.
3
a slipper (= a soft shoe for wearing indoors) or a woman's shoe that is open around the heel
کفش پشت‌باز