“You can roll with the best of them. You gain +20% to your gambling skill.”— Fallout 2 (patched) in-game description
This perk increases the player characters Gambling skill by 20% of its fixed value.
In the unpatched version of Fallout 2 the description of this perk reads: "You can roll with the best of them. You gain +40 skill points to your gambling skill."