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Note added at 4 mins (2023-06-25 14:38:57 GMT)
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Creepy might include fear and weirdness. So, it's not a good option

Odd Duck: An unusual person, especially an individual with an idiosyncratic personality or peculiar behavioral characteristics
https://en.wiktionary.org/wiki/odd_duck

Weirdo: a person who is extraordinarily strange or eccentric
https://www.merriam-webster.com/dictionary/weirdo

The term "غريب الأطوار" in Arabic can be translated as "eccentric" or "peculiar." It is used to describe someone who has unconventional or odd behaviors, habits, or mannerisms. While it does indicate strangeness, it doesn't necessarily carry a strongly negative connotation. It implies that the person has unique or unusual traits that set them apart from others.

In the context of the sentence you provided, it describes the physical appearance of a man who is thin and has peculiar or eccentric ways. It doesn't necessarily imply that he is creepy or negative, but rather highlights his distinctiveness or quirkiness.

So, the sentence would be translated as:

"We don't have any relatives or friends in this country, except for one of my father's acquaintances, who is a thin man and eccentric."
Or
In this country, apart from one of my father's acquaintances, who is a thin and eccentric man, we have no relatives or friends.

crank1 / kræŋk / noun [count]
1 INFORMAL someone whose ideas or behavior are very strange