Odd premise for a contest, but here goes.
Off the top of my head a surprisingly not dirty limerick about my fave Immortal, Lan Cai-he:
The Immortal Lan Cai-he was flaming.
He loved dancing and drinking and gaming
He wore women’s clothes
and powered his nose
and his antics never knew taming
Here's a little typical anecdote about him from history.cultural-china.com
Like all the other immortals he was often said to be in a drunken stupor and he left this world by flying on a heavenly swan or crane into heaven. One day while in a tavern, he had supposedly gotten up to go to the bathroom. But before leaving he flew off on the crane or swan and stripped his clothes on the way up.