When you solidify semen by freezing it into nugget shape, then insert it into a woman's anus, waiting for it to melt and leak out before being served to the man eating ass.
Person 1: Last night, my girl made me some tasty anal nutnuggets, it was great.
Made up from the words nut and noodle, this is a friendly insult used to describe someone who is either-
1. Crazy
2. forgetful
3. Both
4. It can also be used more generally to describe someone who is acting silly/weird/stupid.
5. It may (or may not) also describe a tasty noodle dish.
6. A slightly abnormal 17 year old who enjoys such nerdy activities as internet gaming and listening to the director's commentary on her Futurama dvd box set. In her spare time she enjoys listening to music and plotting world domination.
1. Why are you eating my door you nutnoodle?!
2. Person 1: "Dear me, I seem to have forgotten my name."
Person 2: "You're a nutnoodle."
4. Person 1: "I'm a tap dancing monkey!"
Person B: "Yes... yes you are..." *edging away*