to make exaggerated claims or talk big in a sarcastic or unrealistic manner

他又在放卫星了，说自己明天就能搬进豪宅。

to launch an artificial satellite into orbit

科学家们正准备在下个月放卫星。

to achieve or report a major, often record-breaking success (originally a Great Leap Forward neologism)

在那个年代，各地都在报道农业生产放卫星的消息。