WTF does "Femernyserm" Mean?

A reply to my friend and fellow YouTuber Slaxxxer. See here for the video I'm replying to: https://www.youtube.com/watch?v=wIFx3L3pkW8. Slaxxxer's channel page: https://www.youtube.com/user/slaxxxer.
See here for Slaxxxer's interview on HPANWO Radio: http://hpanwo-radio.blogspot.co.uk/2014/05/programme-86-podcast-dave-rave-part-3.html.
See here for another video reply to Slaxxxer: http://hpanwo-tv.blogspot.co.uk/2016/09/will-slaxxxer-leave-youtube.html.