When a person eats/drinks something, and it's so good the aforementioned person has to utter the word 'fuck'.
Person A: Hey, try this cake.
Person B: Fuck.
Person A: What's wrong?
Person b Nothing - that cake is just effenom.
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.
Buy the mug