messmate

详细解释:n. 同餐之友, 同餐桌的伙伴, 桉树

英语解释：

名词 messmate:

(nautical) an associate with whom you share meals in the same mess (as on a ship)

详细解释：

mess.mate

n.（名词）
A person with whom one eats regularly, as in a military mess.
共用餐者：如在军队集体食堂里经常与某人一起用膳的人