When something irritates you, something that pounces again and again and makes you angry, It is Irascible. It finds its origin in late latin Irascibilis , from latin irasci  means grow angry. It may also be related to  ira ,  anger.

Now let us find a title for the image shown. Lets name it an  irascible curmudgeon.   A curmudgeon is a person who is easily irascible. That is , a curmudgeon is ill tempered, crusty, and difficult person. what a scoundrel!