An ex-Microsoft employee of Google is credited with coining the term during the development of MSN Messenger, since Messenger's small notification windows slide upward into view, like toast popping out of a toaster。
谷歌的前微软员工在开发 msn 的时候创造了这个词，因为消息的小通知窗口从下滑入，就像烤面包机弹出吐司一样。
引自 Stack Overflow：https://stackoverflow.com/a/5134514/7526989