Meanings
Probably originating as a mild insult, as the act of pounding sand is considered not only to be a menial task, but also one which causes no fruition, therefore suggesting those who perform it are somehow hopelessly mentally impaired.
How to pronounce "pound sand":
AU
To engage in a futile activity.
To go away; get lost; go to hell.
Example Sentences
1
If you don't like my suggestion, you can pound sand.
2
He told me to pound sand when I asked for a raise.
3
I don't care what he thinks, he can go pound sand.
4
She told him to pound sand after he insulted her.
5
You can pound sand if you think I'm going to do all the work.