Sugar Bear -- This Is How I Dew ... The Single Life

Sugar Bear was drinking heavily the night Mama June broke up with him ... but he wasn't dipping into the hard stuff -- the reality star was just hitting the Dew.

Sources connected to Suge tell us he spent the night at a relative's house on Wednesday after MJ kicked him to the curb. Then he drowned his sorrows in Mountain Dew and chili.

We're told S.B. vented to his family about his frustrations with June ... including his belief that she is still talking to Mark McDaniel. He also argued with his ex on the phone for hours following the meal.

An earful of June and a bellyful of chili -- not enough antacid in the world.

The next day Sugar Bear rented a new double wide with his bro.