keep one's pecker up

Etymology
From, meaning "nose", by analogy with.

Verb

 * 1)  To remain cheerful; keep smiling.
 * , Episode 12, The Cyclops
 * --Keep your pecker up, says Joe. She'd have won the money only for the other dog.
 * --Keep your pecker up, says Joe. She'd have won the money only for the other dog.

Usage notes
In the US, where pecker means penis, this phrase is not used, as it would likely be understood as a vulgar command to maintain an erection.