tipper
US /ˈtɪp.ɚ/
UK /ˈtɪp.ɚ/

1.
a person who gives a tip (a small sum of money given to someone for a service)
:
•
The waiter appreciated the generous tipper.
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She's a good tipper, always leaving extra for the delivery drivers.
2.
a truck or trailer that has a body that can be tilted to empty its contents; a dump truck
:
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The construction site had several large tippers moving earth.
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The tipper unloaded the gravel with ease.