Making a predicktion about future sexual pleasures is all well and good, but it can also warn if da "generous with his sausage" dude in question is gonna be a real you-know-what in his attitude and overall treatment of you.
"Predicks" is a slang word that the Streamer yourragegaming made when you would make a prediction in twitch chat, everyone in chat can gamble their channel points.
Yourrage/joshy poo: "Mods do Predicks NOW!! We doing a try not to laugh. Vote no, I'm gon secure your bread"