A car ride taken solely (or almost solely) for the covert smoking of cannabis.
It's name references marijuana's unjust illegality and emphasizes its consumption as not just a relaxing recreational activity, but also as an act of civil disobedience.
Someone who is addicted to obtaining money and building wealth. A money addict and fanatic. Breadheads often work more than one full-time job, and some even participate in illicit activities to "obtain the bread".
I don't buy the schmegegge about Morty sleeping with Moira.
His version of the story was pure schmegegge.
The whole schmegegge was made up to get Liz a little bit of attention.