What do you call this facial expression that forms just before bursting into tears? (Especially when a baby has been treated in a way he/she didn't expect and consider it unfair or feels neglected. Of course this pitiful and sad expression with lower lip protrusion is most commonly seen in younger kids; and is not acceptable for adults or they will be considered to react childish.)
Actually I need to know the answer to complete these sentences :
"When the father yelled angrily at the baby, he (the baby) ..(?) and then burst into tears. "
"When the mom took the toy from the baby, he ...(?) and cried."
PS: We have a phrasal verb in Farsi for describing this state and we use it for kids or adults, but when we hear it about a kid we would definitely think of a baby with this facial expression specially with the protruded lower lip. For adults, we would think of them in the state just before bursting into tears, for example; some winners react like this when they recieve their awards or when they are about to make a speech.
Note: Since I need to complete those sentences and they are about kids, if I know the term used for talking about/ referring to this kids' facial expression or state, that would solve my problem.