1. A nautical Expression. Pack Sand originates from the onerous task of filling (or refilling existing) sands bags used for ballast. On sailing ships "sand packing" was done in the bilges. In the days of sail the bilges contained all types of wastes including but limited to fecal material, dead animals and other effluents. Also see pound sand

2. A seafaring insult. When one was told to "pack sand" it was considered a huge insult often resulting in a heated exchange of salty language.Also see pound sand
1. "Bosun Jones tell Seaman Jones to lay below for the sand packing detail."

2"Arrrgh pack sand mate..wait yer turn like ye others." Typical Response: Arr go f@3$% yerself you c@!*%&& b$5#2! son of a whore. "
by Global Feetus April 3, 2007
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The term "pack sand up your ass" refers to someone being completely pissed off at someone else. They are hoping and wishing that this said person would experience the most uncomfortable, irritating, violating and very painful feeling up inside their anus cavity similar to having someone pack beach sand forcefully into their rectum.
Jeffery had taken the liberty to take Lonnie's brand new guitar out of the case and try to play it. While fimbling, fumbling and farting around with it with his greasy , dirty, little inexperienced fingers, he broke 3 of the six strings right off the guitar. When arriving home late that night, Lonnie noticed the guitar was missing from the case. Much to his surprize, Lonnie found Jeffery in his pig sty of his room with the new guitar lying in a corner on the floor with the 3 strings missing. Lonnie (now in an extreme state of rage) told Jeffery to "pack sand up your ass" and actually really meant it.
by SkipSpike666 October 21, 2017
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When one tells a story or states opinions with a series of lies that they are trying to pass off as truth.
At her speech last night, Sarah Palin did little more than try to pack sand up my ass.
by Waxbro January 22, 2016
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When you have sex on a beach without a towel.
"You see that couple over there making out?"

- "SAND PACKING TONIGHT lol"
by Jeezy 117 April 3, 2009
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