What does it mean to use
argh in response to a question like this:
Do you want to play? (All said) Argh.
This is a part of 'peppa pig' animation when it is Danny dog's birthday. All Danny dog's friends have come to his house and dressed as pirates. Danny's father is also dressed as a pirate and tells the children "do you wanna play? Say argh". Then In response they all say "argh" or maybe "ar"
Based on the context it seems to have the meaning of "yes" for me.