The phrase "letted all out" can be defined as the act of releasing pent-up emotions or feelings. There are several synonyms for this phrase, including venting, expressing, releasing, unburdening, and letting go. Venting refers to the act of expressing one's feelings and emotions in order to relieve stress or frustration. Expressing refers to communicating one's thoughts or emotions to others. Releasing and unburdening both suggest the act of releasing internal pressure or burden. Finally, letting go refers to the act of releasing or relinquishing emotional baggage or stress. Each of these synonyms can be used interchangeably to express the concept of "letting all out".