Among my favourites from Funny Poems For Christmas compiled by Paul Cookston and published by Scholastic (though it isn't very) are Santa Is A Biker Now which begins -
'Santa's got a helmet on
And rides a Harley Davidson'
and The Christmas Confessions of Tom Aged Ten which starts -
'I'm Joseph in the nativity play
It's horrid and it's scary
But I'm in love with Amanda Blinks
And Amanda's being Mary.'
and then goes on for eighteen verses!