(名詞) 走在前面擋住去路的人。這個字是由 meander (漫步) 和 Neanderthal (尼安德塔人 -- 生活在距今 12 萬至 13 萬年前冰河時期的原始人) 拼綴而成。

說也奇怪,走在前面的那個人不但走得很慢,而且好像跟你作對似地,當你想從左邊超越他,他也跟著往左邊走,而當你想從右邊超越他,他又跟著偏右走,讓趕時間的你眼看就要遲到,心急如焚,心中不幹譙也難,罵他是白癡、笨蛋、像未開化的尼安德塔原始人 (不是現代人)...。

To meander means to walk slowly, without any clear direction and a Neanderthal, spelt with N for November, was a kind of primitive person who lived in Europe a hundred thousand years ago – something like a caveman perhaps. So when we call someone a meanderthal, we’re combining these two words, meander and Neanderthal. And we’re actually being very rude. We’re saying that the person in front who is slowing us down is stupid, they haven’t evolved, that they don’t know what they’re doing or where they’re going.
—Mark Shea, "Meanderthal," BBC, December 1, 2009