LAUGHING AT SOMEONE WHO PASSES WIND
From the lowly traits of jaahiliyyah is the act of a person laughing at someone who passes wind.
The Prophet (sallallaahu ‘alayhe wa sallam) referred to this and said:
“Why would one of you laugh at something he himself does?!”
It was collected by al-Bukhaaree (4942) and Muslim (2588), on the authority of ‘Abdullaah ibn Zam’ah (may Allaah be pleased with him).
An-Nawawee said in his explanation of Saheeh Muslim, “This is a prohibition of laughing at someone who passes gas aloud. What is binding upon a person (who hears another pass gas) is to ignore it and continue talking or doing whatever he was doing without paying it any mind, as if he has not even heard it. And in this hadeeth are good manners and a nice way of interacting with people.”
And Allaah knows best.