Being hungry causes irritability because of/due to a drop-in blood sugar levels, which triggers the production of certain hormones. These hormones are the same as/similar to (depends what you want to say) fight or flight hormones, which prepare the body to fight or run away. Therefore, it isn't strange to feel a little bit grumpy or impulsive when you are hungry or even to feel rage when you are starving. Given that evidence, maybe it is true that the best time to ask for a pay rise is after lunch.

There is a portmanteau word used to describe when you are angry because you're hungry and that word is 'hangry'. This is the merging of hungry and angry.


Thanks for reading and correcting my entry.