Short for "Fireworks out my ass". Can be used as a reaction to something funny that makes "fireworks come out my ass" or when actual fireworks come out of ones ass.
Example 1:
Person 1 "Brooooo so I hit him right in the face ye. Bare ass n all"
Person 2 " FOOMA BRO!!!"
Example 2 Person 1 "BRO THERE IS FIREWORKS COMING OUT FROM SOMEWHERE BEHIND YOU"
This word is an amalgamation of the words food coma. It commonly occurs after eating too much food and blood rushes to the stomach and intestines. This word is especially useful to use when you slur your words after eating too much.
I just ate way too much at that buffet. I'm fooma'd out. Can you drive? I'm not safe to drive right now.