If Catalonia declares independance on Tuesday I'll go ahead and refer to it as a coup d'etat.
The whole referendum is a farce, with people voting multiple times and an overwhelming majority that didn't have a say in the whole matter, either out of choice or out of fear.
And if Spain decides to send the military their way to shut down their government you won't hear me complain. But it would be more fun to do nothing and watch the whole "country" collapse because no one will officially acknowledge it as a country.