天tin1地dei6堂tong4

English

1. to have lessons very far apart with a big break in between, such as one early in the morning and the next one not till late in the afternoon [colloquial]
2. (university student slang) to have a class in the early morning and then to have to wait for the next class in the late afternoon, literally "sky and earth lessons"

粵語 — Cantonese

1. 大學生用語，即係朝早同晏晝先有堂，中間一大段時間冇堂上；有時會簡稱做「天地」

Examples

• 我寧願神柱有day off，都好過硬食天地堂。

  I would rather have a tight schedule from day to night with at least a day off, than have to attend classes separately in the early morning and the late afternoon.