* Simple: "My cat is the laziest creature I know, he just sleeps all day."
* Comparative: "Even though I was tired, I was still lazier than my friend who stayed in bed all day."
* Superlative: "Of all the students in the class, John is the laziest one."
* Figurative: "The laziest cloud in the sky just sat there, refusing to move."
* With a negative connotation: "The laziest employee in the company never volunteered for any extra work."
* With a positive connotation: "The laziest way to get this done is to simply press this button." (This implies a sense of efficiency, not sloth)
The meaning of "laziest" will depend on the context of the sentence.