Josh Zerker (born 3 September 1992), known online asZerkaa, is a YouTube personality and a member of the Sidemen.
Up until 2014, Josh rarely showed his face on camera and was often seen hidden behind a mask. He is one of the most consistent of the Sidemen and is a regular uploader of Grand Theft Auto V and FIFA videos.
He currently lives in The Sidemen House alongside Vik,Simon and JJ and was originally from London.
He is the oldest of the sidemen.