Top Definition
when a girl's gag reflex causes her to vomit (often thru the nose) while attemting to "deep throat" a guy during a blowjob; occurs when the chic either (a) underestimates the size of the dick she's sucking; or (b) overestimates her oral prowess.

blowjob, deep throat
Things were going great with that hottie last night, until she gave me a shelley dog in the car. What a mess, but i finished anyway!!
by here4you August 31, 2005
1 Word related to shelley dog

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