A verb meaning to engage in and perform aggressive oral sex upon a female while under the influence. Usage is usually accompanied by box as a reference to a womans vajina.
(1)When she asked me to do so, I felt I had no choice but to rosen the hell out of her box.
(2)I realized that the only way I could ensure my sexual dominance was to rosen her box until she asked me to stop.
(3) She didn't want to have sex with me that night, so as drunk as I was I just rosened her box until I passed out.
A verb meaning to screw your friends over for your own personal gain.
Max certainly rosened his entire fantasy football league with that last trade.
I don't think you want to go on a trip with that guy. There's a strong chance you'll end up being rosened.
I never thought Scott would rosen me, but he told Becky that I have a girlfriend just so he could make her stop talking to me and go on a date with him instead.