We often hear people (usually Malaysians) use the words “that’s mean” when they actually want to say “that means”. Or sometimes we hear people say “it’s mean” when it should be “it means”.
“That’s” is a contracted form of “that is”.
“It’s” is a contracted form of “it is”.
So when you say “that’s mean” or “it’s mean” you’re actually saying that something is cruel or offensive.
The next time you catch yourself saying “that’s mean” or “it’s mean”, simply correct yourself by saying, “Sorry. I meant, ‘that means’ / ‘it means’.”