No steriods at all bro, that stuff is really bad for your health. All you need to do is eat food. Eat every damn thing you see, peanut butter, honey buns, twinkies, pizza, ice cream, cinnamon rolls.
It's not hard bro, you get the idea. And pizza cost a lot less money than steroids dude. Think smarter not harder.
I don't know how tall you are but if you are taller than 5'10 and you can't gain weight bro pizza and ice cream are your best friends. And don't say I already eat pizza, cause 3-4 slices ain't enough to gain weight. You are going to have to eat a box a day on top of breakfast and lunch.
Seriously dude how tall are you and what is your age?