The term 'TERRIBLE TWOS CRIES' is used to describe the period of time when a toddler is between the ages of two and three. During this period, toddlers often experience emotional outbursts and tantrums due to their lack of understanding of the world around them. The crossword solution for this term is NOS, which stands for 'Not Otherwise Specified'. This acronym is used to describe behaviors that are not easily categorized or labeled.