Additional pay given to offset the tax impact of premium pay packages.

Typically per diem and other expenses may be subject to taxation after certain time limits.

Some enlightened employers Gross Up these benefits to prevent road whores from dragging up

Caution: Never accept pay for rent without a Gross Up allowance.
Field Engineer #1:"I'm dragging up to go to Mississippi with those welders"
Field Engineer #2:"Talk to those assholes in a accounting - they gross up per diem after the one year mark"
Field Engineer #1: "Sweet"
by Major Kong February 26, 2007
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When there is a close up shot on something gross. Sometimes this gross object can hide its grossness from a further distance.
I thought that Olivia Munn chick was kind of hot, but then they cut from a wide shot to a gross up. Eww. What a man-face.
by HeterosexualMan April 9, 2010
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When a really ugly and/or nerdy and/or fat and/or smelly person invades your personal space and wants to intimately get to know you.
"OH look at poor Sue. that really ugly fat guy with zits erupting all over his face has pressed her into a corner and is trying to grope her. We'd better do a rescue mission because he's getting up gross and personal."
by Scarlett.007 February 6, 2010
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