/ ˈbuːti; NAmE / ( pl. -ies ) noun
1.
[ U ] valuable things that are stolen, especially by soldiers in a time of war
SYN loot
2.
[ U ] ( informal ) valuable things that sb wins, buys or obtains :
When we got home from our day's shopping, we laid all our booty out on the floor.
3.
[ C ] ( informal , especially NAmE ) the part of the body that you sit on
SYN buttocks :
to shake your booty (= to dance with great energy)
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WORD ORIGIN
senses 1 to 2 late Middle English (originally denoting plunder acquired in common): from Middle Low German būte , buite exchange, distribution, of uncertain origin.