Orignally used to describe railbuffs, it now describes anyone who gets excited about something so much that they start foaming at the mouth.
Those geeks that play magic the gathering are foamers. They get so excited over one card that they start foaming at the mouth.
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