1. Generic term for unappetizing breakfast cereal
2. Exclamation of dismay or disgust
3. Generic term for anything of poor quality, uappealing, undesired, etc.
1. Some "Continental Breakfast"--all they had was shitflakes and instant coffee.
2. Shitflakes! She still hasn't returned my call.
3. When I asked the boss for a raise, all I got was total shitflakes.