That doesn't count.
那不算！

We weren't playing for real.
我们不是玩真的。

欠钱时耍赖：

Money has been really tight lately...
最近手头有点紧......

I've had so many other expenses...
我有太多其他的费用要付......

犯错时耍赖：

It's not my fault.
那不是我的错。

He/She made me do it.
他(她)要我做的。

交通违规时耍赖：

I didn't see the sign.
我没有看到标记。

规避责任时耍赖：

It's not my turn to...
这次不是轮到我......

I didn't know anything about it...
我对此事一无所知......