Top Definition
Derogatory term for Marines or other ground troops.

Sand bags are used to stop bullets. Self propelled sand bags are troops who catch bullets.

Military
That troop of marines is a bunch of self propelled sand bags.
by Elephino May 04, 2004
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×