1. 打起精神；振作起来
If you tell someone to keep their pecker up, you are encouraging them to be cheerful in a difficult situation.

2. 鸡巴；
A man's pecker is his penis.

1. horny projecting mouth of a bird

Synonym: beakbillnebnib

2. bird with strong claws and a stiff tail adapted for climbing and a hard chisel-like bill for boring into wood for insects

Synonym: woodpeckerpeckerwood

3. obscene terms for penis

Synonym: cockprickdickshaftpetertoolputz