A sequel, prequel, or any other addition to a series which just doesn't belong. Created solely to squeeze every last cent out of a successful franchise, and often made by someone other than the original creator.
Sam: Remember the Terminator movies, from when we were kids? Those were the days.
Greg: Remember them? They're still making 'em!
Sam: Nope, I'm pretty sure they're not. All that's left now are tack-ons.
Greg: Remember them? They're still making 'em!
Sam: Nope, I'm pretty sure they're not. All that's left now are tack-ons.
by Inertient November 23, 2009
Get the tack-onmug. by MississippiIncenseMan February 14, 2023
Get the Tackedmug. by BE33 October 27, 2018
Get the Tackedmug. Sick fuckin swamp thing who lurks in the shadows and breathes as loud as winter winds.
Often seen around a "Stickley"
Often seen around a "Stickley"
by Stickmeister April 17, 2009
Get the Tackemug. by BigBossMike May 12, 2004
Get the tackedmug. 
