What do you say when someone is making fun of your girlfriend?

well if your a complete t*at youll laugh at her and join in (my bf coughcough)

if you actuall care about her youll defend her "your just jelous she has a life" or "just cuz she has friends" or go with some classic yo momma jokes. theyll back off soon enough

Don't engage in childish behavior. Take her arm and say " Let's go someplace where we can find some intelligent conversation. " and walk away .