What is sofa bed?

More commonly known as a pull out couch a sofa cum bed is a big pullout couch used for sex

“My girl and I had the best sex ever on our sofa cum bed, she squirted so hard”

sofa bed - video

Sofa bed - what is it?

n. A shitty couch combined with a shitty bed.

I woke up with a horrible back ache after sleeping on the sofa bed.