Hey my friends mum died and she gets bullied for not having a mum (idiots), and she just don't know know what to say so shuts up and cries er eyes out. Has anyone got any good disses, or something she could say that would teach them their lessons? Thanks.

Seriously, retaliation is NOT the right approach.
TELL an appropriate adult that this is happening and the protagonists WILL be dealt with.

The teachers don't do anything, they tell er to ignore them so she just cries! Thx for the reply though.

I think first of all your friend need to overcome this grief. Tell her to join hobby classes, activities, physical exercise, sports etc. You can help your friend with this. Retaliation will create more conflict. So tell your friend to focus energy on positive things. Bullies will go away once she will know how to ignore them. Best wishes.

You're her friend - this is what friends are for, to be supportive (not saying you aren't)!
Protect her, but don't lash out at the idiots. Try to explain to them that they will lose their mothers, some sooner than others, and that compassion is a sign of being adult.

I wouldn't let my friend be bullied by idiots. Find an adult she can talk to and you tell the bullies to leave her alone.