What words can I use to insult my teammates?

I am curious as to what I can say to insult my teammates and NOT get banned. For instants, if my Yasuo goes 0 12 in 10 minutes, doesn't listen to the team, and is basically inting, can I call him... Trash? Bad? Garbage? Stupid? Degenerate? Now, without going around the question (especially the mods), tell which one of these words I can tell this Yasuo without getting banned? I'm going to go on a limb and say "none" because League is a PG place where you can't show anything related to FEELINGS.
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