He is _____ up the onions.Keep away from him,or your eyes will feel uncomfortable.

cutting 取一下第一个意思
cut up英音：['kʌt ʌp]美音：['kʌt ʌp] 以下结果由译典通提供词典解释
1.切开;切碎
Cut up the carrots before you put them into the pot.
把胡萝卜切碎后再放进锅内.
2.抨击
The article was severely cut up by some critics.
那篇文章曾受到一些评论家严厉的抨击.