US Army terminology utilized to describe a person or people who are standing around smoking cigarettes and chattering about car chase movies when they should be doing something constructive.
Officer: Where the hell are all of the Soldiers?
NCO: Not sure, Sir, but I think they might be out back.
Officer: Alright, can you get them to load that new equipment onto the trucks by the motor pool?
NCO: Roger, Sir. Smokin' and Jokin' is NOT an MOS, so I will get their attention! (walks away)
NCO to Soldiers: Alright, assholes no more smokin' and jokin'! Get your asses to work, NOW!!!!
US Army terminology utilized to describe a person or people who ditch work/responsibility in favor of taking a nap and then planning some type of criminal behavior thereafter. Akin to the phraseology "Chillin' like a Villain."
Soldier #1: Hey, have you seen Private Snuffy?
Soldier #2: Nah, dude, I think he went to take a nap. He said something about a plan to steal MRE's out of the supply room and sell them on Ebay.
Soldier #1: Ah, so he is Shammin' and Scammin'?
Soldier #2: Yep.