keep one’s pecker up—(UK coll.) keep one’s spirits up:
- Charles could not eat, in spite of the rough kindness of one of the warders, who adjured him to keep his pecker up.
put someone’s pecker up—(coll.) make smb. angry; put a person out of temper:
- He thinks he can do what he likes with I am not quite sure about that, if he puts up my pecker.