system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Is the Millennium Falcon truly the fastest ship in the galaxy or is Han Solo full of it?

Edit:

I mean it's regularly described as a piece of junk and escapes tough situations by the grit of its teeth. And Han Solo hasn't always been very honest about its capabilities. According to George Lucas, the infamous "12 parsecs" line in A New Hope was intended to be a bluff, although later EU authors took it seriously and invented rationalizations for it. I think you could make the case that he was also bluffing about how fast the ship is. What do you think?
gpt
According to Wookiepeida: 

"The Millennium Falcon's Girodyne SRB42 sublight engines were heavily modified through the addition of a SLAM overdrive that rerouted energy for acceleration bursts. Thanks to that, the ship could fly at a maxium speed of 1,050 kilometer per hour in atmosphere and 3,000 G in space.[8] The stock hyperdrive of the YT-1300 series was replaced with a Isu-Sim SSP05.[1] Although the regular SSP05 was a Class 1 hyperdrive, the one that equipped the Falcon had been jury-rigged "Vandangante style" into a Class 0.5 drive[8]—twice as fast as most warships of the Galactic Empire."

So, yes, it's a very, very fast ship. Whether it's the fastest in the galaxy is unknown (the Galaxy's a big place after all) but it's certainly one of the most famous very fast ships out there, having made the Kessel Run in less than 13 parsecs (especially if you round down), flew through the Second Death Star and destroyed its reactor, and provided evacuation for the very last of the Resistance from Crait.