The act of ejaculating across your partners back while having doggystyle sex.
I was bangin this ho last night from behind and when I nutted I gave her the backyard sprinkler.
by Bonedale Ben December 13, 2007
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Fucking a girl in the ass and then shooting your load all over her ass and back

I am pretty sure that Pauly D was a backyard Jersey sprinkler last night with that grenade!
by TheFifteenthMinute June 16, 2011
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