He received a booty-call text late at night, but thought it was too casual.

booty 在俚语中指"性伴侣"或"一夜情对象"，源自海盗掠夺战利品(booty)的隐喻。 call 这里指"召唤、邀请"，字面意思是"召唤战利品"。 booty-call 是俚语，指深夜临时发出的性邀约，带有随意、非正式的性质。