A word used in various games to describe rare, valuable, or large amounts of loot/money/items gained in a short period of time. Examples may include rare drops from enemies, or gaining large sums of money relatively easily.

Two examples would be Legendary Item drops in Fallout 4, rare items in 7 Days to Die, or massive amounts of credits (especially earned as pilots) in Heroes & Generals.
Fallout: "Damn, that legendary laser rifle was some fat loot."
7DTD: "This horde dropped enough parts to make a whole magnum, that's some fat loot."
H&G: "Playing as a pilot is guaranteed to reel in some fat loot, 10k+ credits a round."
by Georgiye July 15, 2017
Get the Fat Loot mug.