涉及(與某人的)爭論(或爭端、糾紛)
lock horns (with sb) (over sth)
to get involved in an argument or a disagreement with sb
The company has locked horns with the unions over proposed pay cuts.公司與工會就減薪計劃爭論不休。
釋義來自《牛津高階英漢雙解詞典》第 9 版