Try some of these patterns.
/[^a-z0-9]{20,}/ too many CAPS or SYMBOLS in a row.
/((.)\2{14,}?)/i repeated character 15+ times.
/((.{2,}?)\2{4,}?)/i repeated 2+ characters 5+ times. eg, LOLOLOLOLOL or HAH HAH HAH HAH HAH
/(\S{4,})(?:.*\1){4,}?/i using same 4+ characters (words) 5+ times anywhere in sentence.
From a conversation the other day I had with another twitch.tv user in ##mIRC on Freenode.
How would I do an if statement with all of them?