" To beg off" means to decide not to do what you were going to do.

“beg off” 意思是决定不做你打算做的事。

The last time we talked, I said I would think about partnering up, but now that I have, I'm going to beg off.

上次我们谈的时候， 我说我会考虑合作，但现在我已经考虑了， 我要放弃了。