— what’s .. a flannel club?

“…Shit.” If word gets back to Reiner that Christa’s heard of the club, he’s gonna kill you, bro.
"Y'got a problem with my lingo, Springer?” “Why is her knowin’ about the club a problem, bro? She’s not gonna ruin...
”Canyon crawler? The hell, man…“ "An’ nothin’ happened to her, but… she overheard me talkin’ bout the club.”