✔ 最佳答案
放飛機(失約, lut 底) 的口語:
1) to ditch someone
2) did not show up
3) stood somebody up
i.e. 我的女朋友昨晚放了我飛機
/lut 底.
1) My girlfriend ditched me last night.
2) My girlfriend didn't show up last night.
3) My girlfriend stood me up last night.
*** To break the promise是違反諾言, 意思唔同放飛機。
參考: I live and study in the US.