Mummy dust is things that have happened in the past. They're history, old news. Things that
people won't let go. When old
people talk about "well back in my day." Or people who are always bringing up stories from
high school. Shit's mummy dust.
"
Corey Colteaux is always talking about
high school, always bringing up mummy dust."
E-40 Revenue Retrievin': Day Shift (Everyday is a Weekend) lyrics -
"saw some suckaz I don't trust (what they do)/
got to bringin' up old mummy dust/
pullin' up the past/
talkin' loud
like a big mouth bass"