Melayu Boleh is a phrase in Bahasa Malaysia (national language of Malaysia). It can loosely translated into English as 'Malays can'. It's a twist on the national slogan "Malaysia boleh". Though in itself, the phrase is quite innocent, it has been hijacked by pornographers. It has become a popular key word for searching for Malay porn on search engines.
There have been some effort to reclaim the phrase from the pornographers but it's a loosing battle and after some success, the pornographers are winning again.