Never smile at a crocodile 
No, you can't get friendly with a crocodile 
Don't be taken in by his welcome grin 
He's imagining how well you'd fit within his skin 

Never smile at a crocodile 
Never dip your hat and stop to talk awhile 
Never run, walk away, say good-night, not good-day 
Clear the aisle but never smile at Mister Crocodile 

You may very well be well bred 
Lots of etiquette in your head 
But there's always some special case, time or place 
To forget etiquette 

For instance: Never smile at a crocodile 
No, you can't get friendly with a crocodile 
Don't be taken in by his welcome grin 
He's imagining how well you'd fit within his skin 

Never smile at a crocodile 
Never dip your hat and stop to talk awhile 
Never run, walk away, say good-night, not good-day 
Clear the aisle but never smile at Mister Crocodile