The Grineer are one of Warframe's core enemy factions, a decaying empire of cloned soldiers players have fought since the free-to-play shooter launched in 2013. Bro Team are long-running Warframe YouTubers known for loud, comedic commentary during missions, and this shout fits their style of turning a routine alert into a running joke. Gaming communities pass the clip around as a shorthand alarm for incoming enemies, in Warframe and well beyond it, because nothing says your plan just failed like hearing the Grineer are here.