To suck or lick an ass, drinking all the juices and pulling your tongue deep inthe asshole. You get a really good taste(I have tried it with my cousin)
My Cousin: Will you suck my nude ass Eidur?
Me: With such a great pleasure!!!
Then my cousin got naked and gave me his hairless ass.
After I ve finished, he said:
That was the best ass sucking.
(This happend really)