Something that's nagging and then builds up inside and eventually turns into an annoyance.
"I know something you don't know!"
... (Conversation carries on and the 'something' still hasn't been told)
"Please just tell me! It's grating on me now!"
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