Gift of Gab

Gift of Gab is a perk in Fallout 4.

Requirements
To gain the perk, the Sole Survivor has to befriend Piper.

Effects
The player character gains double the XP value when persuading other people or when discovering new places.

Behind the scenes
The "Gift of Gab" refers to the Irish legend of kissing the Blarney Stone. The legend states that the kisser of the stone is granted the Gift of Gab, that is greater eloquence or flattery.

"The Gift Of GAB" actually refers to popular Starcraft 2 streamer "Steven Density Ascaban Overrustle Senpai Bonnell II" who with his friend "Chad Mothafuckin Jones" who is also known as "Minigun", played in a 2v2 Starcraft 2 competition. In this competition they named their team Guns and Broaches, which can be shortened to GAB. IN-game they would constantly spam their opponents by saying "We got the gift of GAB." This perk in fallout is clearly a reference to that.