To wank off.
While the British term wanker is used humorously in the US, it's also a derogatory term meaning "someone who masturbates". You may use it with people you know very well and that won't be offended, but never use it in polite company.
4th Gen Diamond Maknae, more commonly known as Hueningkai of TOMORROW X TOGETHER is the youngest of his group. He has unique visuals, can do several things and is very talented. Writing, singing, rapping, dancing, producing, playing different instruments, you name it. It is also a title that MOA created for him.
"Hueningkai is so talented, another name for him is 4th Gen Diamond Maknae!"
Golden Maknae is a Nickname for Jeon Jungkook, a member from BTS. Jungkook is the youngest from BTS that's why he is the maknae. The golden stands for how he is good at everything. He is like exceptional in EVERYTHING HE DOES for example Bowling, playing games, sports, singing, dancing etc.. He can pretty much do everything. Even if it's his first try he can somehow manage it to be amazing at it.