What is what does chalant mean?

The word "chalant" is not a standard or commonly recognized word in the English language. It doesn't have a formal definition in most dictionaries. It is likely a made-up word or a colloquialism, generally used (often humorously) as the opposite of "nonchalant".

Therefore, if someone uses "chalant", they are usually implying:

• Being concerned or anxious: Opposite of being indifferent or unconcerned.
• Being enthusiastic or eager: Opposite of being casual or laid-back.
• Being overtly interested or involved: Opposite of being aloof or detached.