1. 吹风笛的人；风笛手
A piper is a musician who plays the bagpipes.

2. 谁出钱谁做主；花钱的人说了算
If you say 'He who pays the piper' or 'He who pays the piper calls the tune', you mean that the person who provides the money for something decides what will be done, or has a right to decide what will be done.

noun

1. someone who plays the bagpipe

Synonym: bagpiper