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1.
When you're banging a bitch on the beach and you shove her head in the sand and continue banging her from behind
Brian was at Fuck Pier and gave Jodi The Ostrich.
by BlackMikeMoan August 27, 2013
 
2.
The act of a man twisting his penis in reverse, and inserting it into his own anus, causing the penis to resemble an ostrich burying its head into the sand.
Did you hear about Jimmy? His mom was traumatized when she walked in on him doing the ostrich!
by Louden Swain September 29, 2011