She'd had enough, and she didn't give me a Dear John letter, but she did give me this, a Dear John plaque.
她受够了，她没有给我一封分手信，她却送我了这个，一块分手板牌。
英语百科
Dear John letter
A "Dear John letter" is a letter written, originally to a soldier overseas, by his wife or girlfriend to inform him their relationship is over, usually because the other has found another lover.