A phrase used by people when something unexpected/bad happens, used in the same way as "fish sticks!", "fuck.", "oh shit!" or "Bob Saget!"  You can say it to anything that compares to biting into a donut filled with cum instead of jelly.  The most effective phrase to use that doesn't include a curse word.
boy:  "I'm so happy, i finished my homework and i think i'm going to get to third base tonight!"
friend: "Yeah, that Dickens essay took forever to finish"
boy: "Essay?!? Cum Filled Donuts!!!
friend: "Yeah, that Dickens essay took forever to finish"
boy: "Essay?!? Cum Filled Donuts!!!
by A International Poon Handler February 11, 2009
 Get the Cum Filled Donutsmug.
Get the Cum Filled Donutsmug. by cumf1lledd0nutt December 21, 2024
 Get the Cum filled donutmug.
Get the Cum filled donutmug.