Hi Leon, In the U.S., employees over 40 years old are protected by the Age Discrimination Enforcement Act which makes it illegal to fire a person, solely because they are older. You have to be over 40 to be protected by this act. Is that what's going on where you live?

It usually means to return to a place of success, after dealing with a setback or some other life failure.

This slang dictionary is a good reference both common use slang, as well as regional phrases. www.urbandictionary.com

Joining this group.

Although I'm a native English speaking, I still make myself learn new words, that aren't necessarily used in everyday conversation. I've never been a fan of memorizing anything, so I would never advocate drills; although some learners find this approach to be effective. Here are the steps that I follow when I want to learn new words. 1.) Each week, identify 10 new words in which to learn. 2.) Look up the words in a dictionary and write their meanings on a piece of paper. 3.) Read over the list a few times and think about what words I already know that are similar in meaning (synonyms). 4.) Over the week, practice using the new vocabulary in sentences. For example, let’s say you just learned the word ‘starving’, which Americans often use in place of ‘very hungry’. Instead of saying “I’m very hungry”, swap in the new word you’re learning and say “I’m starving”. This is a simplistic example, but gives you an idea on what works for me. A modified version of this approach, that fits your learning style, may help you. Please let me know if it does. Best wishes. Yono

This expression has evolved from its original form. The original expression is: If that's what you think, you've got another THINK coming. In answer to your question, it's an expression that opposes a stated opinion. In a sentence: If you think you're getting into Harvard University with poor grades, you've got another thing coming.