Definition - What does Jaggies mean?
Jaggies is a term for various kinds of anomalies in computer graphics outputs or display imaging. The result displays shape edges composed of small squares or “steps” instead of a smoothly contoured line.
Techopedia explains Jaggies
An effect called aliasing occurs when multiple sampled signals become confused. This is one reason for jaggies to occur. Jaggies can also happen when a display device lacks resolution, or a bitmap is converted into some other format.
Techniques like anti-aliasing or smoothing can help to reduce jaggies. Some of these techniques reduce the pixel size of the display image or try to straighten out programming problems that lead to blocking edges or jaggies.