Top (top) is the top in English. Top-rank means "one of the best or most popular." Often after the word "top" there is a number indicating a list of 10, 20, 100 or 1000 best.
"Prokhorov is among the top 20 Russian oligarchs"
"Tema Lebedev is not a top blogger, but shit"
"Top designers in Moscow are very often gay."
And so on and so forth.
The word "top" can also mean the top of the clothing, from the neck to the waist. Hence "topless" (topless, "without top") - a man naked to the waist.
The top is in the list: Slang