Being a leader in one's field.
Being relatively heavy.
Important or impressive.
Of the heavyweight boxing (or similar) division.
A similar division and contestant in other sports.
A very large, heavy, or impressive person.
The professional boxing weight class for boxers weighing more than 190 pounds; a boxer in that division.
Not any thing; no thing.
An absence of anything, including empty space, brightness, darkness, matter, or a vacuum.
Something trifling, or of no consequence or importance.
A trivial remark especially in the term sweet nothings.
A nobody (insignificant person).