or else

1. 否则; 要不然

They told me to leave at once, or else.

他们要我马上离开, 否则(对我不利)。

You will stay away from my girlfriend, or else.

离我女朋友远点, 否则要你好看。

Hurry up or else you'll be late.

快点, 否则你要迟到了。

or so

1. 大约

It'll only cost 15 dollars or so.

只要十五美元左右。

There were twenty or so.

大约有二十个左右。