wing mirror 
noun
A rear-view mirror projecting from the side of a motor vehicle.Visibility in the miniscule rear view mirror is like watching traffic through a spy hole, whilst the wing mirror proves pretty much ornamental....
- I pulled myself aloft into the cab, steadied my nerves with a few deep breaths, checked the wing mirror, which is the size of a widescreen television, and pulled away.
- A quick blip of the keyfob, touch the button under the wing mirror, the glass lowers and the door pops open.
- butterfly weed
- butterhead lettuce
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- but that
- but that's another story
- butthead
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- butthurt