The Collaborative International Dictionary
Muddlehead \Mud"dle*head`\, n.
A stupid person; a blunderer. [Colloq.]
--C. Reade. --
Mud"dle-head`ed, a. [Colloq.]
--Dickens.
Wiktionary
a. Thinking in a muddled way; not thinking clearly
Usage examples of "muddle-headed".
In the missions which they had so long tended with such care, giving their muddle-headed love to the Indians in their Machiavelian way, all was confusion in the space of six short months.
Their suspicions will be sustained and developed by the clumsy and muddle-headed political and economic aggressions of the contemporary political and business systems, such as they are, of the West, now in progress.
The last thing she needed was to get muddle-headed in a strange eating-house in a strange city, and although small beer didn't have a lot of punch to it, drinking too much could still put you under the table, and if it was this hot all night, she'd be resorting to her mug fairly often.