Box of Kittens 

Used in emergency cases of extreme sadness, at which point you grab the box of kittens, and dump it all over said consumer

He's going into happiness failure! Get me a Box of Kittens, stat!

Side effects of kittens may include:

Sneezing
Tiny Scratches
And Erectile Disfunctiuon

Box of Kittens by Rick Avis October 23, 2007

Maniacal Box of Kittens 

Someone who from a distance appears sweet and innocent but once in close range is wild and manic and will pull you to your own demise with their fluffy murder mittens.

She is like a Maniacal Box of Kittens. Irresistible and deadly.

Maniacal Box of Kittens by Maniacal Murder Mittens October 1, 2023

maniacal as a box full of kittens 

Term that pretty much speaks for itself; someone who is mellow and not very wild at all, especially when it comes to sex.

I dumped my girlfriend today...let's face it, in bed she was about as maniacal as a box full of kittens.

maniacal as a box full of kittens by TenInchPlaya October 15, 2006