I would like to preface this by saying that I'm most definitely not old. I mean, I grew up watching DanTDM, PewDiePie and the like at the later stages of their popularity. You can probably estimate my age given that information, and even I know, understand, and use "lingo" as a word. I understand that it may be an uncommon word to use in sentences purely due to the similarly uncommon topics that it would be used on but it is most definitely not archaic as you both make it out to be. I really don't get why it's so shocking for someone to use it here.
Regarding the cooking slang I was talking about, it wasn't that popular back then so I get that you wouldn't have seen it, but it was definitely used. It's also different from the "let him cook" memes.
He wanted to show his dad that he was strong and courageous, that he was able to survive through this without shedding any tears. Although, the task was hard because he could feel the tears sting in his throat, begging him to let them fly out.
That's when a girl came up to me. I wouldn't have noticed her if she didn't tap me on the stomach. I looked down at her and muttered, "What do you want?"
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Regarding the cooking slang I was talking about, it wasn't that popular back then so I get that you wouldn't have seen it, but it was definitely used. It's also different from the "let him cook" memes.