irritability (
http://definr.com/irritability)
n 1: an irritable petulant feeling [syn:
crossness,
fretfulness,
fussiness,
peevishness,
petulance,
choler]
2: excessive sensitivity of an organ or body part [syn:
excitability]
3: a disposition to exhibit uncontrolled anger; "his temper was
well known to all his employees" [syn:
temper,
biliousness,
peevishness,
pettishness,
snappishness,
surliness]