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An expression used in the académe industry which means , to have a terrible teaching method but is a good friend/mentor.

Usually applies to educators and professors.
Professor Snape is acting like a complete guinto but at least he makes up for it when it counts.
by Oxxy_Montalvy September 13, 2016
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2
It is a type of teaching method that makes relatively easy concepts impossibly difficult and will make you realize that the only thing you will be able to learn is the fact that when tungsten is heated it lights up.
Guinto sucks!
by Asis_Rhoderick May 31, 2011
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