"Float Lock Down" was the form of snake oil Monkster (aka Jerry Williams, fake PhD and house painter turned investment guru) was selling to his acolytes. Google "Monk's Den" if you want more information.
The "Float Lock Down" was allegedly a way a "team" of investors could force a short squeeze in a thinly traded pink sheets stock. Of course, it turned out to be just another variation of a pump n' dump. Monkster bought a whole bunch of stock cheap, then announced the "Float Lock Down" and sold after his acolytes ran up the price. His true believers were then stuck when the share price collapsed.
GRNO had been announced by Monkster as one of his "FLD plays." A check of his old board on Ihub will confirm this.