A real life garment used by the military, a poncho like material is attached with fresh leafs and woodland materials so the user can blend in with the given enviroment. A suit donned by Snipers, typically SAS and such.
The Ghillie has also featured in FPS video games, COD4, CODWAW, this gives the user(a sniper can only use them) a tactical advantage when it comes to grassy areas, but the developers pulled them off poorly and they rarely work.
(n)- when your friend is banging a chick, you cover yourself in dirty laundry on the floor so you can move along the floor to watch, in a properly concealed state. The laundry blends into the environment and breaks up your outline, much like a ghillie suit worn by military snipers
guy 1: "dude, you should have seen me banging my girlfriend last night!"
guy 2: "Ya, I did, I did the dirty laundry ghillie suit"
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.