1. "made with poor craftsmanship or with low quality materials"
2. "rundown and shabby"
3. "poorly or dishonestly executed (badly done)"
The term comes from way back in the day to describe making yarn out of scraps of clothing or low-grade wool, but is now used to refer to any number of things that are low quality, dishonest, or cheaply made.
2. "those mechanics did a shoddy job fixing my car."
Locally and Nationally people also use it as a way of describing ones state when one is high from smoking biftas
"I am feeling a bit shoddy"
Principle of shoddy is much like the concept behind shotgun
A: Who wants my last cookie?
B: OOh, me!
C: Shoddy cookie!
B: Shoddy cookie blitz!
<person B gets the cookie>
A: One of us has to go shovel the driveway.
A: Shoddy no shovel, no blitz.
B: ... shit.
<person B must shovel>