The meeting was too boring, so she made an excuse and bailed out early.

bailed out 是动词短语 bail out 的过去式形式。bail 原意是"保释金"，bail out 字面意思是"用保释金把人保释出来"，引申为"从困境中脱身"或"提前离开"的意思。在这个例句中指"找借口提前离开"的行为。