Adj. Someone who is consistently childish, permanently indignant, or perpetually petulant.
When Mike announced that the new approach wasn't going to meet the requirements, Eric responded perpetulantly because he had already implemented this approach with all of his clients. This was not the first time, nor is it be likely to be the last, that Eric jumped the gun, was disappointed, and reacted childishly.
by gidklio October 04, 2013