Spoken with a dumb, slow voice, it's a dismissive answer to any retorical question about numbers that someone asks to make a point.
Wife: (making a point) You ate that whole bag? Do you know how many chips that is?
Husband: (slow, dumb voice) A hundred?
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