Oh word. I just kneejerk whenever I see 4chan. I've never met a more miserable crowd of people than the alt-right transfolk that lurk /b, /soc, and /lgbt
Different boards have different slang and I used to browse it back in the day. DIYers and the trans on trans infighting is an obvious giveaway. If you are not sure you can search the post number in one of the many archiving sites. Different archives track different boards so if you arent sure which board its from you may need to search a few different archives.