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Tweaching is a slang term for stressed-out teachers who instruct their course while "tweaking" on crystal meth.
"With the end of semester and holidays coming up I'm going to be tweaching all month to relieve some stress."

"Tweaching ruined my career"
by soulshaker425 December 03, 2009
Teaching others how to use Twitter.
I'll be tweaching my peeps on how to formulate an appropriate tweet.
by Tom T. Witter, Tweet E. Byrd August 21, 2009