My definition/suggested meaning of a 'deecher' is a phoney teacher - one who's unqualified
and/or unable to teach adequately due to a bad accent or a low level of the English
language.

The parody becomes more sensible if its a thick accent. Someone like Turnoi who speaks English as a second language and with a thick accent. Pronouncing the 'T' as a 'D' sound is famous with Indians but could also apply to Turnoi and other Eastern Europeans though it might be more like 'Daecher'. "He iz-za Daecher". An Indian would be closest to 'Deecher'.

So if his idea was to parody accents then that can work but still only mocks certain groups who are prone to 'Dee-cher'. A Frenchman might say something more like 'Tai-sher' and so 'Deecher' isn't going to mock or parody them.

Okay, but here's the problem. Okay 'Deecher' could be a laugh at an inadequate pronunciation (such as Turnoi has or Indians) BUT that doesn't tell us about their teaching skills, their competence, their skill levels in any other area. Indeed, some brilliant English teachers can have an accent but otherwise be doing everything else right. Indeed a very popular English teacher here spoke with a South American Spanish accent. Something closer to 'Dee-cher' and would even use his accent as an example. Showing how he was prone to pronounce a word then (example) then getting himself and everyone to do a 'T' sound. Great!

So the parody term just doesn't work. It's almost like Turnoi is so stupid he once saw that little insider joke of 'Teecher' (indeed we would purposely spell it that way as a laugh). He then saw someone mocking an Indian English accent with the classic 'Deacher'. Turnoi, who is prone to 'not getting how stuff works' decided it would be TWICE AS DEADLY if he cleverly COMBINED the two parody ideas HAHAH ROFLMAOfffff!

No.

It doesn't work like that.

Then it reminds me how he has heard the term 'Dancing Monkey' and is just smart enough to understand its some kind of 'insult' BUT he's dumb enough to use it properly, in context, where and to whom etc.