As an adjective: Big, huge, heavy, thick, fat. As of now, to be used in a more day to day use.
As a verb: to push/ to have been or pushed from previously held position. To be moved physically; emotionally if you want...
Positive: "Bro thats sumo (big/huge) news!! Im happy for you!"
Solemn: "Sorry you had to experience that in Iraq. Thats some sumo (heavy) shit."
Negative: "You sumo (fat) bitch."
As a verb: "She just came in and just sumoed (pushed) me out of the way."