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To thrust one's bosom upon another in such a way it is insulting.
The last test was really difficult, so much so that Larry was boobslammed.

Larry, "How was the Halo tournament?"
Jane, "We lost. The team we versed boobieslammed us so hard we lost by 25 points. I swear that narrator should have said 'Lost Hope' to us."
by Pancake Spout October 19, 2010