A reader sent an anonymous suggestion for the term "ชีกอ" (ชี-กอ) with the translation "a person who hits on people indiscriminately."
The word can be found at https://dictionary.sanook.com/search/di ... 1%E0%B8%AD :
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"ชีกอ(จ. ผู้หลงใหล) น. คน (มักหมายถึงชาย) ที่ทำเจ้าชู้กับหญิงไม่เลือกหน้า.
... [from Chinese meaning a person who is infatuated with] noun a person (usually a male) who flirts or hits on women indiscriminately.
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Might the English equivalent be "flirt" "lecher" "womanizer" "lady's man" "skirt chaser"?
What do you think?