Most vulgar drivers / stage-end interviews across the years?
Some great ones like Gronholm's "Up in the *ss of Timo" or Panizzi's "he not sport! *Whistle sounds*" as well as some of the modern era come to mind.
Drivers are full of adrenaline at stage end and immediately are shoved a microphone in their face resulting in some great quotes across the years, an aspect I love about this sport. Glad the FIA stopped fining drivers for swearing at stage end.