ATLANTA—Rapper Young Jeezy, attempting to put the finishing touches on his latest single "U Know Da Club," has exhausted every rhyme possibility for his song's third verse with the exception of "Cliff Clavin," the fictional postal-worker character portrayed by actor John Ratzenberger on the long-running TV show Cheers. "I've already got 'dance-club maven,' 'hip-hop haven,' 'yes I been cravin',' 'ain't misbehavin',' 'pussy gonna cave in,' 'G's I been savin',' 'steel engravin',' and 'rantin' and ravin','" Young Jeezy said. "I guess I could use 'shock-wavin'' or 'clean shaven,' but they just don't make as much sense in context as 'just like Cliff Clavin.'" Jeezy is also struggling to complete a track called "Ideal Woman," since he cannot find a single rhyme for "Rhea Perlman."