C mamo is a extremely bad ass word that you could use as a response to every question, you can also use "C mamut", "C pillin", "C bolla", "C biche", or every spanish word that starts with "Se" replacing it with "C".

when you're hungover as shit after a spending a night drunk as a skunk

Its a spanish expression, it means what someone screwed him.

It have so much "versions" like: C mamut, C marmol, C marmota, C maforo, etc.

When you say something funny and smart