spivvy

Example:Much to everyone's surprise, the usually peevish old man was in a good mood today.

Definition:Showing or feeling a censorious or cross spirit, with an inclination to take offence.

Example:She had been extra irritable lately due to the change in her medication.

Definition:liable to be easily annoyed or offended; having a disagreeable temper or mood.

Example:After some coaxing, the naughty child finally tidied up his room.

Definition:wilfully bad or mischievous; disobedient.