A way giving something high praise by combining best/greatest and adding an R for a child-like effect.
Anne: You are 40 years old and you still live at home?!
Fred: Yeah well, my mom does all the dishes, the laundry, and buys all the groceries. She the brestest roomate ever!
Fred: Yeah well, my mom does all the dishes, the laundry, and buys all the groceries. She the brestest roomate ever!
by White N' wordy April 11, 2011
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