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In business vernacular -- to check the facts on something.

Origin is from Triple Beam referring to the triple beam scale for measuring weights, and often heard in hip hop / gangsta rap lyric's.
"Hey, what did you think of that ROI I worked up for the McCleery project"?

"It looked good, but I need to T-beam it before I forward it to finance"
by Sidney V September 21, 2011
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