怪我咯 is a colloquial way of saying "it's my fault" in Chinese. It is used when someone takes responsibility for something that has gone wrong. The phrase has no direct English translation, but it can be translated as "it's my fault" or "blame me." Here are a few example sentences in English and their translations:

我没带钥匙，怪我咯。(I didn't bring my keys, it's my fault.)

他晚到了，怪我咯。(He's late, it's my fault.)

我错了，怪我咯。(I was wrong, it's my fault.)

The phrase 怪我咯 is a combination of the words 怪 (guài), which means "blame" or "fault," and 我咯 (wǒ luō), which is a colloquial way of saying "me" or "my." The phrase is commonly used in spoken Chinese, particularly among younger people.