1. Sorry lah, I got test coming, got to study!
We have so many tests, that no one else can keep count of them! muahahaha!

2. Cannot meet you, so sorry, I’m on call / post call that day!

3. I’m so busy, I barely have time to shit and sleep, going to keel over from exhaustion liao, sorry lah, cannot meet you for dinner…

4. Coffee? No la, I don’t drink coffee.
(Switch to tea/alcohol according to situation)

5. Sorry, my brother/sister/cousin/nephew/niece/neighbour/friend having exam, have to give him/her extra coaching!
You’ll never run out of people who need your expertise!

6. Eh cannot, I got family dinner.
At least you know people won’t be so BHB to invite themselves along!

7. Sorry, I’m meeting my friend on that day, he’s very busy lah, so cannot change our appointment for another day.
Actually you might as well say,
Sorry, I’ve got a date that day!

8. Reply the sms (if he asked by sms) a few hours before the supposed meeting time and say, ‘Sorry, I just got your message, must be the stupid [insert your service provider], always delaying smses, it’s a bit too last minute now la… I got stuff on already.’

9. For guys only: Sorry, I got to go home to accompany my mother for dinner…

10. Just ignore the sms.

Come to think of it, I don’t think my excuses are powerful enough, have used all except no. 9, but they’re like bouncing off some kind of wall…

I don’t want to be rude either…