stands for "Let's Get Drunk". describes people that drink just to get drunk and do stupid things like smoke weed, or get pregnant. they are usually seen wearing Uggs and a black Northface. pictures of them posted on facebook usually consist of beerpong and red Solo cups.
shaniqua: "how was the party?"
ashley: "omg, it was so fun! i got sooo drunk and hooked up with mike"
ashley would be the LGD in this situation.