Osman Bülent Kayabaş (17 June 1945 - 19 April 2017) was a Turkish actor. He appeared in more than one hundred films from 1963 to 2017.

He is particularly notable for his villain role in the 1973 film Karateci Kız where his character's dramatic and seemingly unending death —dubbed "Worst movie death scene ever"—became a viral hit, gaining millions of views since it was highlighted online in 2012.