That strong coffee was a real pick-me-up for me, keeping me awake all night.

pick-me-up 是由动词短语 pick me up 组成的复合名词。pick 意思是"拾起、提起"，me 是"我"，up 表示"向上"。 pick-me-up 字面意思是"把我提起来"，引申为"使人振作、提神的东西"，在这里指"提神饮料"或"兴奋剂"。