Snigger is just a variant form more common in the UK, where snicker is the preferred one in the US. Though I wouldn’t put it past a 4chan user, it’s also a perfectly normal word they may have learned being taught and exposed to UK variants of English.
I thought, and a quick Google confirms, that it is used in the Harry Potter series a few times. Obviously, you might not have read them, but for people in my cohort, that was likely our largest exposure point to British culture.
Snigger is just a variant form more common in the UK, where snicker is the preferred one in the US. Though I wouldn’t put it past a 4chan user, it’s also a perfectly normal word they may have learned being taught and exposed to UK variants of English.
That’s so weird, I’ve literally never seen that form used even by people from the UK.
I guess it’s plausible that they’d just write it like that, I guess.
The secret third option is that they know that it’s a way of spelling it and prefer to use it because hehe n word.
I thought, and a quick Google confirms, that it is used in the Harry Potter series a few times. Obviously, you might not have read them, but for people in my cohort, that was likely our largest exposure point to British culture.