If I recall correctly it was a term popular in other circles (like /r/theredpill on reddit) that make up a lot of the popular online alt-right communities (like /r/the_donald) [1]. The merging of these communities (that generally seem to have hate and/or cynicism as their common thread) resulted in new insults like libcuck (combination of libtard and cuck). It would be fascinating if it wasn't so depressing.

[1] https://fivethirtyeight.com/features/dissecting-trumps-most-...