futu-ți morții mă-tii

Etymology
lit. 'fuck your mother's dead relatives'.

Interjection

 * 1)  motherfucker!, son of a bitch!
 * 2)  used as an intensifier mainly addressed to the person they're talking to.
 * 1)  used as an intensifier mainly addressed to the person they're talking to.

Usage notes
A strong profanity used to insult or express anger towards someone by referring to their deceased family members in an offensive manner and should be avoided in any form of conversations, it is never used as a noun.