A 'slotmachine' is a woman'scleavage. Can only occur in women who have fairly large breasts. Cougars often use their 'slotmachines' to attract young, wealthy men.
Silkmachine is a guy that sit behind a computer screen all day and plays Minecraft.
He is extremely cool and you should become like him (Urban Dictionary is gonna reject this, I swear
Person 1: Woah dude, I was playing Minecraft and Silkmachine showed up. I started making blood sacrifices to him because he is cool (sunglasses emoji)
Person 2: Man, I wish I was as cool as him!