Usually an interjection. The word itself can have many literal meanings, however, based on your standpoint on matters of religion or diety. The 'God Cock', per se, could either be,for example, Absolutley massive, on a godly scale, to non-existent from an atheistic viewpoint.
God Cock! My testicles are perspiring. Marc, wipe them for me.
As a gerund or modifier: This is God-cocking bullshit.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."