Self control is defined as the ability to manage your actions, feelings and emotions.
An example of self control is when you want the last cookie but you use your willpower to avoid eating it because you know it isn't good for you.
control of oneself, or of one's own emotions, desires, actions, etc.
Control of one's emotions, desires, or actions by one's own will: “You think yourself a miracle of sensibility; but self-control is what you need” (Mary Boykin Chesnut).
self- +"Ž control
- the control of oneself; the ability to master one's desires and impulses