Green’s Dictionary of Slang

sand n.2

used in the following combs. as a derog. nickname for a Middle-Easterner.

In compounds

sand coon (n.) [coon n. (5)]

an Arab from the Middle East.

[UK]Guardian Rev. 3 Mar. 4: Chief Elgin bitterly objects, as an African American, to other ranks’ use of the phrase ‘sand-coon’ […].
sand nigger (n.) [nigger n.1 (1)]

(US) an Arab or any other native of the Middle East (except Israelis); also attrib.

[US]D. Jenkins Life Its Ownself (1985) 92: We got to deal with Dune Coons [...] Sand niggers [...] Your A-rabs.
[US]S. Morgan Homeboy 17: Them sand niggers got all kinda sheep and camels running loose.
[US]J. Lerner You Got Nothing Coming 56: The fucking Muslims, motherfucking sand niggers, raised so much shit about it [i.e. pork] being against their so-called religion.
[US](con. 1998–2000) J. Lerner You Got Nothing Coming 182: I got one of them sand-nigger prayer rugs the Muslims gotta use […].
www.theassassinatedpress.com 26 July [Internet] Police Shoot Brazilian In Head Seven Times: ‘Blimey the bloke was brown like a sand nigger.’.
[US]R. Price Lush Life 28: Tristan looked at the rubberneckers [...] sand niggers, flat-face Chinese, blancos, other kids .
sand toad (n.)

(US) an Arab, a Middle Easterner.

[US](con. 1998–2000) J. Lerner You Got Nothing Coming 182: I got one of them sand-nigger prayer rugs the Muslims gotta use when they beg Allah for another oil well or missile or whatever the fuck those sand toads pray for.