Stemming from a mix up of the two phrases, "Before you buy the car, you gotta take it for a test drive," and "why buy the cow when you can get the milk for free," this phrase is interchangeable with the former. You would say this if your friend wants to remain abstinent until after marriage.
Brad: CLAIRE! You can't marry him without doing the deed. What are you thinking? You gotta taste the sweet milk before you get the cow! Straight from the teet, Claire. Come on!
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.
Looking or experiencing something nice after witnessing something horrid like a disgusting gif or a disturbing video. Typically used as eye bleach are nice images of whatever makes the disturbed person happy.