Named after the depressingly insane internet troll, "The Writing Wrench", to go "Full wrench" is to say that someone is insane without justification or explanation.
"Did you see Cindy pull her pants down last night and spend half an hour eating dog biscuits?"
"I know, right? She went full wrench."
"I know, right? She went full wrench."
by Rakuli November 3, 2013