Fauxjo is something or someone trying to be cool & look like they have Mojo but failing. A bit like in 'Pretty Fly For A White Guy'.
"Look at him with his fake vintage Guitar."
"Yeah, he's oozing fauxjo."
Or someone who goes out & buys a job lot of 60's Soul records & then pretends they're some sort of knowledgeable record collector who's been into the music for decades.
Or cars like the New Beetle or New Mini which look a bit like the old ones but have none of the character or Mojo, just Fauxjo.