A niche genre of metal that doesn't even really mean anything, anytime you hear someone say their band is Spunge Metal, it's just a funny way to poke fun at folks who care about genre too much. The name came from the idea of every metal genre being sponged up into one genre and then being spelled similarly to "Grunge"
yo bro, check out this cool spunge metal band, they suck, teehee uwu
A fun sponge in the military is a socially inadequate, humourless & deeply unpopular person who, through a sense of bitter loathing & revenge, sucks all the fun out of everything. Normally calls senior officers ‘sir’ on twitter.
Dude: why don’t we show our human side & engage online?
Military Fun Sponge: all this social media stuff is only a passing fad & has to be boring.