This is a great mug as a gift or as a wee treat to yourself. These mugs are always popular with both Scottish and International visitors as they love the fact they always know someone who they can associate with one of the words.
A very descriptive word for someone who perhaps has a wee lapse of concentration, or even a "senior moment", resulting in them doing something pretty stupid'!
Other appropriate words could be dunderheid, eejit,glaikit, daft or maybe even "no the full shillin'"
"Hey maw - is ma middle name Numpty?"