0 the quality of becoming annoyed very easily and of not being patient:
Tiredness may account for some of his testiness.
Then, with testiness in her voice, she added, "Sometimes a breakfast is just a breakfast."
They were frayed at the edges and it showed in their testiness .
By the following morning there was a considerable amount of irritability and testiness in the air.
He exhibits none of the Prime Minister's ill-concealed testiness.
This leads to greater tolerance (leniency) of miscommunication in interactions with prestige groups but less tolerance (testiness) in interactions with members of a socially marginalized group.
It is not just testiness on the part of teachers.
Any humour that there was fell very flat and the testiness was unnecessary.