an overstuffed down jacket or coat

I used to have the tre deuce
and the deuce deuce in my bubblegoose
now I got the mac in my knapsack
--Notorious BIG

Black BMW with rims to match, windows bulletproof
One night, he jumped out the car
and caught a bullet in his bubblegoose
--Wyclef Jean

He keeps it fundamental
He's got the jeans and the bubblegoose on
There's murder on his mental
He's got the deuce deuce in his palm
--Everlast

A belt-bag, usually referred to when drug (esp. marijuana) is carried in it.

"And the duce duce in my bubblegoose"