唔o拏耕

[Meaning] Have no relation

Example 1
I have no relationship with him, so I will not lend him the money.
我同佢都唔o拏耕嘅, 咁我又點會借錢比佢呢.

Example 2
You answer is no related to my question.
你都唔o拏耕嘅; 我問你東, 你就答西.

In some case, 唔o拏耕 is similar with 牛頭唔搭馬咀.
http://goto-cantonese.blogspot.com/2010/09/blog-post.html

o拏(音: 啦)