Chester mentions looking in the "who's who binder" for information about the episode's villain. "Who's Who" was a comic book published by DC that featured biographies of DC heroes and villains. A later version of The Who's Who series was an actual three-ring binder, allowing you to remove outdated pages and insert updates.
In the comics, Tinya Wazzo is Phantom Girl, a heroine from the 31st century and a member of the Legion of Super Heroes.
Back in the Blood and Truth arc, Nash's Eternium detector picked up a similar signal coming from Iris. This may be a key hint in explaining what is going on with the Negative Still Force popping up in her life.
Tinya hasn't heard of the Flash or metahumans, despite both being public and well-documented knowledge since 2015.
When Chester says "flame's on," it's most likely a reference of when the Human Torch from Marvel Comics Fantastic Four says "flame on."