Talking with a russian friend of mine about russian nicknames she said that if you add a letter 'к' to the persons official nickname it means you don't like that person.
For example for Александр the nickname is Саша and if you don't happen to like this person you call him Сашка.
Is this a common practise and does this work with every nickname? For example it would seem hard to add к to катя.
-к-and-ок– Баян Купи-ка Oct 08 '16 at 16:00коробкаyes but notкоробОК– Баян Купи-ка Oct 08 '16 at 18:14-окalways adds diminutive connotation,-к-does not, in the lists of suffixes i checked they're listed separately, not as variants – Баян Купи-ка Oct 08 '16 at 20:06