irritarded
When an individual is extremely irritated to the point where their speech becomes impaired.
Jim was so irritated with Jess he became Irritarded.
Irritard
Irritards are people who are irritated and become incomprehensibly Retarded.
I was trying to have a conversation with Sally but John the Irritard wouldnt turn his music down, so I said, DAMN! JOHN! turn that music down you Irritard.