Top definition
Best Friends Forever With Ultra-Benefits: just a (best) friend (forever), who will gladly marry you and have your babies.

pronounced: buff-wub.
Yeah, he's my BFFWUB, we're hella tight.

Will you be my BFFWUB?

OMG UR SO HOT WILL U B MY BFFWUB?!

Yeah, my hubby/wifey used to be my BFFWUB.
by boburnhamisourbffwub August 15, 2009
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