Jack Off Class 

Any class that is so boring and pointless that you might as well be jacking off instead.

I hate going to ASO 100. It's just a jack off class

Jack Off Class by trenchcoatjoe May 16, 2015

middle class jacket 

To take off your middle class jacket is to do something that would not be regarded as traditionally socially acceptable in middle class society.

I'm going to take off my middle class jacket and play with those African Kids

middle class jacket by egls6 September 21, 2017

classjacking 

When a class discussion is hijacked by a rambling, tangential and eventually irrelevant but wholly derailing observation, grievance or out-and-out rant by one of the class participants.

We were in our final session on behavioral economics and this woman started classjacking the discussion into the moral underpinnings and motivations of the study of economics, behavioral or otherwise.

classjacking by panopticonopolis November 10, 2009

classjacking 

the act of a class co-opting an existing oppressed class’ cause, culture and terminology to advance its own agenda

A real life example of classjacking would be the trans movement pretending to be an ally of gay rights and co-opting the social justice language deceptively.

classjacking by Nerida November 5, 2013