The phrase "solid snake" refers to a stealthy and skilled video game character who goes by the name of Solid Snake. It can also be used metaphorically to describe someone who is quiet, skilled, and not easily seen or detected. Full definition
Why not play the character that inspired solid snake? (filmjunk.com)
Yesterday, news broke that David Hayter — the man who's been the voice of Solid Snake in all the English language releases of the storied Metal Gear Solid games — wouldn't be coming back to reprise the role. (kotaku.com)
Donna Burke echoes what Japanese actor Akio Otsuka tweeted, the voice of Solid Snake in Japan, who also asked for fans not to «punish» the development team because of the fiasco. (gamewatcher.com)