[The Iceman Cometh]

Pound Sand

"The origin of the expression go pound sand is from a longer expression, not to know (have enough sense to) pound sand down a rathole. Filling rat holes with sand is menial work, and telling someone to pound sand down a hole is like telling them to go fly a kite. The expression dates to at least 1912 and is common in the midwestern United States."

http://www.urbandictionary.com/define.php?term=pound%20sand

[blam]

That’s a ‘fair to midlin’ answer.