1) A person who gives someone else an unreasonable ultimatum.
2) When one person in a relationship forces the other to get what they want.
3) When someone gets loud and angry because their demand is refused.
"He was immature when he demanded that I must let him use my new car or he won't love me anymore"
" You were so immature to move out on Christmas because he didn't purpose"
Take me to Hawaii" "No" "I HATE YOU! YOUR THE MEANEST PERSON ON EARTH!" "That's so immature"