I'm a JW. Being a naughty one, I sometimes substitute "worldly" sayings that JWs do not say with other ones.
For examples, on JW birthdays, I'd sometimes said "Happy One Day Closer To Your Death!"
Or around Christmas time I'd say "Merryyyyyyyyy.... had a little lamb". Priceless reactions.
What 'substitute' expressions did you use as a JW?