crybaby
n. countable C1 Advanced US //ˈkɹaɪˈbeɪbi// UK //kɹˈaɪbeɪbi// cry·ba·by
n. a person who cries or complains too much, especially when they are upset or hurt. It is a rude way to describe someone who is very sensitive.
n. a person who is perceived as being overly sensitive or prone to crying and complaining. Highly informal and derogatory in register; typically used to dismiss someone's emotional reaction as trivial.
He is such a crybaby when he loses a game.
The older kids called him a crybaby because he fell down while riding his bike and immediately started to weep.
While some critics argued the film was emotionally manipulative, others dismissed the audience's reaction as the work of a bunch of crybabies looking for a cheap sob story.
From cry + baby.