Noun. A fusion of the words boner
and manequinn, meaning a manequinn (usually in a wide, open, busy, and public store such as Macy's), whom is modeling tight clothes or underwear, has received a penis-shaped object (usually found in the store itself) in its pants or underwear, creating the illusion that the manequinn has a boner. Ultilized best when choosing an easily-visible manequinn in the busiest part of the store.
Tonight fredrick, marshall, betty and I are going to create some bonequinns in DICK's Sporting Goods.