Ass Penny

You know those pennies that are about 100 years old and looked like they were shoved up your ass? Yeah, those are these pennies.

Person: What type of penny is that?
Me: Oh this? This is an ass penny.

penny-assed

giving something so little effort that the words half-assed or quarter-assed don't do it justice, and only with the 1/100 denomination of the full effort (penny) can one comprehend the sheer lack of effort put in.

x: Dude has Edward done his part on the group final yet?
y: Yeah, he's done his part, but it was so penny-assed that we're gonna have to redo it.