let me go have mental break down now (parts 2 and 3)

good word isnt ?I
Learnt it from a description of Jack Dee's character in Lead Balloon. (BBC)
Great series if you haven't seen it. Still great even if you have.

from vocabulary.com
Dyspeptic is an old-fashioned word not often used anymore. It describes someone who is irritable due to depression or indigestion.
Nowadays we separate people who are depressed from people who are cranky because of indigestion, but dyspeptic rolls both these conditions into one ball of fun. A common dyspeptic type would be an old man shouting "Get off my lawn!" to kids playing on the street.