Classic Poem

Sir Plausible, as 'tis well known,
Has no opinions of his own;
But closes with each stander by,
Now in a truth, now in a lie,
Fast as chameleons change their dye;
Has still some applicable story
To gratify a Whig or Tory,
And even a Jacobite in tatters
If met alone he smoothly flatters;
Greets friend and foe with wishes fervent,
And lives and dies your humble servant.