When you are cuddling up against someone's butt (i.e. spooning), then that person is your Cuddlebum.
This term came to fruition and gained popularity from the show Will & Grace when one of the characters asked "Will you cuddle me bum?" and the nickname Cuddlebum was then given.
RANDOM GIRL: I'm lonely and cold; I need someone to cuddle me bum!
RANDOM BOY: I'm lonely. I wish I had a Cuddlebum!
(**BOY and GIRL hear each other, look at each other, sparks fly. They get in bed together and spoon**)
The action of poking your cuddling partner with your erect penis until she agrees to do something with it. The best course of action to take after developing a cuddlylump
I was so tired last night but i couldn't sleep because he kept cuddlyhumping me with his cuddlylump so i just gave in and blew him.
when you put a book in the oven at 3 am and it catches fire and the whole house is burning down and your family is dying and your mom's last word was 'this is why I should've aborted you' and you get to heaven and meet god and he says 'I regret inventing the earth'