When someone verbalizes something that leaves you with an extremely disturbing mental image, you may reply "Dead Puppies, Dead Puppies, Dead Puppies" because the mental image of dead puppies is not a disturbing as the one the speaker left you with.
Mum: Your father and I had sex for 3 hours last night
Me: Oh Mum, Dead Puppies, Dead Puppies, Dead Puppies
By Alexandra
Sack Of Dead Puppies
A way to describe how a car handles if it handles bad, like a sack of dead puppies: Cold, squishy, and floppy.