rusty dusty

noun

rusty dusty

noun

1

Informal The buttocks of someone who sits and does nothing.

Leave these ladies at rest on their big fat rusty dusties?2006, Mo Foster, A Blues for Shindig, page 70:
He frowned then yelled, “You'd better get your rusty-dusties in gear and get to the wardroom or you're gonna be flying the rest of the day on an empty gut.”2012, David G. Weaver, The Eagle and the Osprey, page 279:

2 more examples

Probably the safest and easiest 'tool' that you can use to get off your rusty-dusty and follow your choice of exercise routine.2012, D.B. Myers, The BodyWise Health System, page 37:
You can't afford to just sit there on your rusty dusty feeling sorry for yourself.2014, James Willis, Faith Made Easy:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.