What-lah is this all about?

When you speak to a Malaysian you will notice the suffix "lah" frequently occurs in conversation. What's all this, then?

"Lah" is a suffix in Bahasa Malaysia that is meant to add emphasis to a word or phrase. "Just do it" for example, would roughly translate into "Buat sahaja" but more forcefulness would be obtained by adding the suffix, e.g. "Buatlah sahaja".