I am a skinny guy and my metabolism is very fast, I have to eat a lot LIKE A LOT to just gain a pound. But that's not the problem, so recently I've been on a holiday break, for a month, I have been hitting gym for a month plus before that but I don't want to stop training for a month, and it's not worth to sign for gym membership because I am going back to my uni soon.

So can anyone here suggest a routine for me to hit every part of my body?

I only have a pair of dumbbells, the kind that you cannot add additional weights on it, and no bench/pull up bar.

Yes. But right now I'm at my home.