The term 'anger about European flower ring' can be summarized by the three-letter word 'LEI'. A LEI is a traditional Hawaiian garland or necklace made of flowers, leaves, shells, and other natural materials. It is often given as a symbol of love, friendship, and respect. In recent years, the term has been used to describe similar necklaces made from European flowers, such as roses, daisies, and lilies. The term 'anger about European flower ring' is used to describe the feeling of frustration or annoyance when someone wears a LEI made from European flowers instead of traditional Hawaiian ones.