Que te den morcilla = May you get some black puddding*

Get stuffed, Piss off, Bugger off. This "lovely" food-related idiom can be changed so that the person we want to get some black pudding, does get it ;) You can change the pronoun "te" and use "le", "me", "nos", "os", "les" to your own convenience.

Si no quiere venir, que le den morcilla.
Estoy harta ya de ti. ¡Que te den morcilla!
Como no quisieron participar, ahora, que les den morcilla.

If you want to know about the curious origin of this expression. Click here to read about it