A term used within the Xbox gamerscore community to refer to the act of buying lots of video games, multiple consoles, or collecting every special edition of a game ever made.
The term is a reference to elite achievement hunter BL4CK SiLvA, who is known for posting pictures of his enormous collection, streaming with it as a backdrop, and pretty much owning all the games you wish you did (or are glad you don't, cause the suck).
"I'm pulling a Silva and buying every Pinball FX-2 table while they're on sale."
"I pulled a Silva and ordered the Titanfall Collector's Edition as soon as it was announced."