A man who has an ongoing sexual liaison with a married woman at her behest. An especially desirable arrangement for men who want the perks of a girlfriend without the worry of long term commitment.
Feel neglected? Never petted? Sister, you need to get yourself a boy in a box!

Oh Vic, sure I’d leave my husband and breed with him, but he only wants to be my boy in a box.
by gildedprincess August 8, 2007
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In this fun filled game girls first pick a boys name out of a hat. Then the chosen boy is bound and gagged inside of a large metal box and are fucked while the box is rolled down a large hill.
Over break we went to my friend's house and we played boys in a box. I brought the chains.
by ape11111111112 January 9, 2009
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Metaphor used when there is well known bitch or rebel in a community or small area.
Person1:”mark is the bitchiest boy in the box.”
Person2:”yeah.yesterday they vandalized the school entrance.”
by BuggieWuggie November 15, 2020
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Everytime I chew on Gaines' boy box he is giddy with joy to the point of manking on my face.
by Matt Whipple January 23, 2009
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A person who looks like one of the homosexual guys who model on hair product boxes.
1: Look at pretty boy box shard.
by Cloud01 August 9, 2007
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Hot person: Hey do u know who is boy._.box?
Not hot preson:No? Who are they?
Hot 0erson: Its an seggsy bitch who uses she/xey pronouns and we need to pray.
Not hot perosn:Why?
Hot person: Because Damien supremacy!
Tae/Damien (boy._.box,hottest person) supermacy🛐
by Sophie Walten July 29, 2021
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A person who keeps changing their name an pfp that also bites ice cream and kins perfuma from she ra and Lilith and willow from the owl house
"Hello!"

"Hello Damien pissbaby!"

-how to be a good friend to boy._.box
by August 4, 2021
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