I think you'll find that its:
Spam Up,
Spam Up and get out the can,
Spam Up just to feed your man,
Spam Up ‘cause it’s great outdoors,
Spam Up when you could eat a horse,
Spam Up for a special tea,
Spam Up for an anniversary,
Spam Up for the taste of it,
Spam Up,
Spam Up and be proud of it.
(Yes i googled it, I'm sad)