older male cousin from my mum's sister..
这个 绝对 是表哥,就是麻烦点.
或许可以分几句话说
I have older cousin
he is the son of my mum's sister
表哥
[词典]cousin; a son of father's sister or of mother's brother or sister。 who is older than oneself; elder male cousin;
[例句]请允许我介绍我妻子的表哥,扎卡里·科伦索先生。
Allow me to present my wife's cousin, Mr Zachary Colenso。