Sip

I was chatting to this Indonesian bloke who was multitasking with replying his email in English. Suddenly he was complaining about his habit of replying or IM-ing in Indonesian.
As it turned out he just replied to this email: "I'll look forward for your call when you have cluster ready", with: "sip". It's what we Indonesian use for "OK" or something along the line.

We were laughing about it when a reply came from his working partner: "sip? what do you mean sip protocol"

He got some explaining to do :D