I want to know the best way to not laugh at something my friend says by accident.Few days ago my friend said she will poop up at the party by mistake (she wanted to say pop). I started laughing but d…

I want to know the best way to not laugh at something my friend says by accident.Few days ago my friend said she will poop up at the party by mistake (she wanted to say pop). I started laughing but didn't think about her feelings. She is a very sensitive person and don't want to heart her feelings again. What do I do?