You had to call your cable company because of a problem with your bill. They made you wait on the phone for a long time. You're complaining about this experience to a coworker. You say:
They had me on hold for like 20 minutes!
When you call a company, they sometimes have to "put you on hold". When you're "on hold", you can't hear the other person. Sometimes music will play while you're on hold. After you've waited for a while, the other person will pick up the call again.
In the example above, the speaker says that the company "had" him on hold instead of "put". The word "had" instead of "put" communicates the feeling of being forced to wait.
"Like" sometimes means "about". Use it this way before a time or a number:
There were like well over 500 people there.
Some older people don't like it when people use "like" in this way, but it's a pretty well-established part of spoken language for a lot of English speakers now. It's not used in formal writing or speeches.
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