noun
baksheesh
bak-SHEESH/ˌbækˈʃiːʃ/
A small payment offered for a service or favor.
The porter receives a little baksheesh for carrying the heavy luggage.

Etymology
A Persian word meaning “gift” came to denote a present of money. That monetary sense covers both a gratuity and a small bribe.
More examples
- The traveler offered baksheesh after receiving help with directions.
- An official demanded baksheesh before processing the routine paperwork.
- The memoir describes baksheesh given for small favors.