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1.
A phrase used when someone needs to do a multitude of tasks before doing something else. Such as going to the bathroom, making a sandwich, finish a conversation, check Facebook, put on cosmetics, change clothes, finish chores and homework, water a plant, get a drink, grab some money, make a phone call, feed a pet, etc.
Friend: "Hey bro, you wanna go shoot some hoops?"

You: "For sure man, just hold on a mango. I gotta go finish up some stuff."
by laurenandgalen December 17, 2011
 
2.
A phrase used when someone needs to complete a multitude of tasks before doing something else. Such as going to the bathroom, settling family quarrels, grabbing food, changing clothes, put on cosmetics, make a sandwich, finish homework, grab a beer, do chores, etc. One mango of time can depend on the person; fairly quick or a long, long time.
Friend: "Hey bro, you wanna go the basketball court and shoot some hoops?"

You: "For sure man, just hold on a mango. I gotta finish up some stuff real quick."
by Mangomasochist December 17, 2011