chalant 

adj. (slang, humorous)
denoting a person or behaviour that is serious or formal; concerned with the matter at hand; not casual

A fallaciously derivative antonym of the word nonchalant. "Nonchalant" is actually a standalone word borrowed from the French "nonchaloir" meaning "unconcerned". We never took the word "chaloir", however, and turned it into "chalant". We could have done, but we didn't.

All that said, treating that first syllable as a prefix (which it was in the French) and extrapolating that chalant must be an antonym of nonchalant is actually reasonably logical and reflects the historically procedural manner in which the English language is developed.

Nonetheless, at this point in time the word is only legitimate as a form of humorous slang.

While his manner could not be described as nonchalant, he had already enjoyed too much wine to be truly chalant.

chalant by The Real NH April 29, 2020

Calantha 

A beautiful, but insecure girl, who is constantly fighting and searching for the good in the world. She is intelligent and funny and will always be there when you need her. Anybody would be lucky to have a Calantha in their life.

Calantha is one of the greatest people I've ever met.

Calantha is beautiful

Calantha by allthebrightplaces November 29, 2015

chalant 

1. Extreme concern about an object.
2. Concerned

A chalant person is very concerned about every little detail

chalant by Metz November 4, 2003

Chamanth 

A sexy big dicked black nigga. (Lover of Shrila)
He's lover also, fighter also~

DAAAAMN THERE GOES THAT CHAMANTH. HE'S SUCCESFULL NOT GO HAVE SEX FOOL

Chamanth by Karan's mom February 16, 2023

chalantly 

To remove the non from a word to seem cool, but really just piss everyone off.

Ammar said chalantly.

chalantly by DesiDaroo January 15, 2011

Vom Chalant

To vomit and brazenly act as if it were not anything but de rigueur. Throwing up like it ain't no thang. Tossing one's cookies with an air of relaxation. Literally, a combination of vomit and non chalant.

DOOD: So listen, girl, I think you <yak! hwarf!!> lookin' real serious tonight, and I was wonderin' if you would be interested in accompanying me back to my crib.

DOODETTE: That was real Vom Chalant, and all, but I think I'll be fine at my own place.

Vom Chalant by cerveaux September 23, 2006

chulantha 

causing or inducing awe; inspiring an overwhelming feeling of reverence, admiration, or fear:

an awesome sight.

exhibiting or marked by awe; showing reverence, admiration, or fear.

Slang . very impressive:

HOLY COW ITS CHULANTHA THE AWESOMEST KID ON THE BLOCK

chulantha by LUKE PURCHASE January 29, 2019