It's an expression to say you've got to do something. To do your duty or when something reminds you to do your duty.
An simple example of this is:
When your you're chilling on a sofa and suddenly your baby starts crying and you gotta check it out, then you might say: Oops! Duty calls!!
When your you're chilling on a sofa and suddenly your baby starts crying and you gotta check it out, then you might say: Oops! Duty calls!!
by Luiz Fernando January 29, 2009
 Get the Duty callsmug.
Get the Duty callsmug. by Njm1234 July 14, 2016
 Get the Duty callsmug.
Get the Duty callsmug. Much like a Booty Call, this occurs when a dude calls another dude at an ungodly hour (possibly drunk) to play Call of Duty.
Dude1: "Hey, what's up, you... awake?"
Dude2: "Dude, it's 2:30 in the morning."
Dude1: "Yeah, I just got home from the bar. You, uh, you want to come over and play some Modern Warfare 2?"
Dude2: "Dude, I can't be your Duty Call tonight, I have work in the morning."
Dude1: "C'mon, I need you... to help clear out the favela on veteran in spec ops mode."
Dude2: "I'm there, my job sucks anyway."
Dude2: "Dude, it's 2:30 in the morning."
Dude1: "Yeah, I just got home from the bar. You, uh, you want to come over and play some Modern Warfare 2?"
Dude2: "Dude, I can't be your Duty Call tonight, I have work in the morning."
Dude1: "C'mon, I need you... to help clear out the favela on veteran in spec ops mode."
Dude2: "I'm there, my job sucks anyway."
by HardluckMovies November 20, 2009
 Get the Duty Callmug.
Get the Duty Callmug. Similar to a booty call, during a Duty Call a guy texts you for entertainment when he has been slayed during duty and is waiting.
by aleacim March 19, 2010
 Get the Duty Callmug.
Get the Duty Callmug. by travlax April 22, 2009
 Get the Duty Callmug.
Get the Duty Callmug. Similar to a booty call, except that the summoned departs to play a Call of Duty game online rather than any sexual acts.
by Rich Yorick November 27, 2010
 Get the Duty Callmug.
Get the Duty Callmug. "hey Bob, do you want to go to the bar with me and a few buddies tonight?"
"Oh no thank you Jeff. I heard Janet from down the street lost her husband in Iraq, so i have duty call."
"Oh no thank you Jeff. I heard Janet from down the street lost her husband in Iraq, so i have duty call."
by lyricall mad-libs April 6, 2010
 Get the duty callmug.
Get the duty callmug.