buckshee
noun
buck·shee ˈbək-(ˌ)shē 
ˌbək-ˈshē
1
British : something extra obtained free
especially : extra rations
2
British : windfall, gratuity
Word History
Etymology
Hindi bakhśiś & Urdu bakhshish, from Persian bakhshīsh — more at baksheesh
First Known Use
1919, in the meaning defined at sense 1