Pronunciation: [mˈə͡ʊst kˈɪlə] (IPA) 
The spelling of "most killer" may seem straightforward, but there are a few phonetic elements worth noting. "Most" is pronounced with a long "o" sound, as in "toast," and a soft "s" sound, as in "rose." "Killer," on the other hand, has a hard "k" sound followed by a short "i" sound, as in "sit," and a long "e" sound, as in "sheen." When pronounced correctly, "most killer" should sound like "mohst kil-er."
Most killer is an idiomatic expression that is commonly used to describe something or someone that is exceptionally powerful, impressive, or effective. The term "most" serves as an intensifier, emphasizing the level of impact or quality possessed by the subject being described. The word "killer" in this context metaphorically suggests that the thing or person being referred to possesses attributes or abilities that are so remarkable, they can be considered figuratively deadly or superior.
When describing an object or concept as most killer, it implies that it outperforms or surpasses other similar items or ideas in its class. This may be due to outstanding features, exemplary performance, or exceptional functional capabilities that make it highly sought after or revered.
In regards to individuals, most killer would typically be used to express awe or admiration towards someone who has achieved immense success or displayed extraordinary skills in their field. It implies that they are a force to be reckoned with and have a significant impact on their surroundings, perhaps even outperforming their counterparts.
Overall, the term most killer is a colloquial and informal expression used to denote exceptional quality, influence, or achievement in a particular context. It conveys a sense of admiration and astonishment at the remarkable attributes or accomplishments of the subject being referred to.
The phrase "most killer" does not have a specific etymology, as it is a modern slang phrase that is derived from the words "most" and "killer". However, we can examine the etymology of each word individually:
1. Most: The word "most" comes from the Old English word "mǣst", which means "the greatest in number or amount". It evolved from the West Germanic word "mestaz" and traces back to the Proto-Germanic word "maistaz".
2. Killer: The word "killer" originated from the Old English word "cyllere", which referred to a murderer or one who kills. It ultimately comes from the Old English verb "cyllan", meaning "to kill". The word has remained relatively unchanged over time.
