Top Definition
When a chick deepthroats too aggressively, and her gag reflex causes her to unexpectedly vomit on your cock.
"My date gave me a gastric lube job the other night, in the front seat of my car. It still fucking stinks so bad, I had to take the bus to work!"
by D. Gould April 19, 2006
5 Words related to gastric lube job

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