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1.
A sexual act performed while engaging in intercourse on the beach. The male removes his penis, dips it into the sand, and then holds on tight as he reinserts making the female squawk and flap around like a seagul
During senior week I gave this slut a sandy seagull. She married my brother. It makes family reunions awkward.
by Hemmerly December 11, 2006
 
2.
While having sex with a girl on the beach you pull out, dip your dick in the sand, and put it back in.
I met this butter face at spring break and I gave her a sandy seagull.
by demonload November 25, 2009