Slang for money. Comes from ducat, originally an Italian gold coin which later (about 400 years later) was also made in silver in other European countries.
To Deck, To get decked; to hit or be hit viciously hard without mercy, usually in the mouth or nose region. To strike down upon another human with great vengeance and FURIOUS anger.
"I just decked Stephanie in the nose cuz the bitch didnt have my money"
"If my manager doesnt give me next friday off ima deck him right in his mouth