Pump and dump
Also called pump-and-dump, pumping and dumping, pumped and dumped, #pumpanddump
Pump and dump means expressing breast milk and pouring it away instead of giving it to the baby. Parents use it most about alcohol, and often with a joke.
How it's said
...just curious as to when you should pump and dump?
I was used to expressing by the time I needed to pump and dump so that wasn't an issue...
More like Cowchella, lol. Jamiroquai was soooo worth the pump and dump.
Who says it
Where it came from
The phrase is older in finance, where a pump and dump is a fraud that hypes a stock and then sells it. Wiktionary quotes a 2000 New York Times report in which the SEC called it a classic market manipulation.
Wiktionary records a second, baby sense: expressing milk and throwing it away, typically after an infection or alcohol. In 2018 the model Behati Prinsloo captioned a pumping photo from the Coachella festival #pumpanddump, and People covered the backlash.