Laughing at yourself
It is healthy and wonderful to laugh at yourself, with yourself.
Sometimes others laugh at you and you join in: This is cause for pause.
A group laughing at one person could be about shaming the other and "correcting" their behaviour.
Then when laughing with others, at yourself: A split is created in you and the shame took on. The correction is accepted.
Laugh at yourself, only in a kind and appreciative way.