To be hangry means becoming angry because you are feeling hungry. (Slang)

For example:

She gets hangry if she skips lunch. 

He was so hangry he couldn’t focus on work.

The kids were hangry after the long trip.

If I miss this snack, I get a bit hangry by the time dinner rolls around at 7ish!

Some people get hangry when their blood sugar levels drop and their irritability rises.

Tradução:

Hangry é uma expressão informal (gíria) que corresponde à fusão das palavras angry (com raiva) e hungry (faminto). Ou seja, descreve uma pessoa que está faminta e irritada. Ou ainda, irritado de fome.