The Grinning Liar was a YX-1980 space transport ship utilized by smugglers named Chak and Kee.
During 137 ABY, Chak leased his vessel to Jariah Syn and Deliah Blue; however, they were apprehended by the Feeorin pirate named Rav. Rav then surrendered them to Darth Krayt's Galactic Empire and seized the Grinning Liar. At some point after, Chak, Kee, Jariah Syn, and Cade Skywalker infiltrated the Crimson Axe. Following a brief skirmish, Rav unwillingly returned the Grinning Liar to Chak and Kee as their property. The last known sighting of the ship occurred at Socorro Spaceport, where Chak informed Cade that he intended to disappear into the galaxy for a period, suggesting Cade do likewise.
A few months after this, the Grinning Liar became part of a massive fleet composed of civilian volunteers. This fleet assisted the Galactic Alliance Remnant with the evacuation of the world Dac, which had been subjected to poisoning by the One Sith in an attempt to eradicate all life there.