To summon your inner manhood- prepare yourself for an immense amount of suffering and learn to enjoy it. To man up and keep pushing either in a combat situation or a civil situation.
"Private, I don't give a f*ck if your feet are bleeding ranger up and finish this ruck march."
"Bro, this chick is super hot but shes got a fat friend who needs a companion, ranger up and be a wingman"
"Half of my equipment is broken, people are shooting at me, but I still ranger up and keep humping along"

"the fuck you mean you cant drink anymore, ranger up son"
by thatonedudewiththebigcawk October 22, 2013
Get the Ranger Up mug.
to dress/wear three or more, noticable articles of clothing of one's favorite color.
"Yo, we headin' to the mall. Ranger up and meet us there."
by Cygnus Atratus November 17, 2012
Get the ranger up mug.
n. Named for the U.S. Army Rangers, an elite group of soldiers.
Commonly done as a military initiation joke, the subject is blindfolded, and two people hold his shoulders down. Another soldier (more commonly one who has been in the service for a while) stands with his pants down so that when the other two release the subject, his face plants right in the standing soldier's ass-crack.
"Man, my buddies thought it would be cool to have me do Ranger Sit-ups. Even the sarge was in on it..."

"Alright, private. Time to try your luck at Ranger Sit-ups."
by crissmichaels September 27, 2009
Get the Ranger Sit-Ups mug.