Germatic is when a person freaks out over anything involving Germs! Its used when someone is losing their marbles over coming into contact with germs, either real or imagined.
The special type human behaviour that German people typically consider to be socially acceptable and responsible. However, in fact this is highly demanding, rude and entitled when compared with the social norms of the rest of human society on Earth.
The other flight passenger demanded that I straighten my chair, despite it neither affecting him nor bothering the passenger behind me, a clear example of his Germanity.
The manager unilaterally set unreasonable deadlines, and his Germanity led him to become angry when the employees expressed their discomfort.