Kurwwa with a doubled w is a stretched online spelling of kurwa, a very common Polish swear word used as an all-purpose exclamation of anger, surprise or disbelief. In meme edits the word escaped its language roots and became a universal frustrated shout understood from context and tone alone. Short clips of it circulate on soundboards and in gaming videos, where the exaggerated pronunciation does the work even for viewers who speak no Polish at all today.