while in the midst of giving a slutty girl a blowjob you proceed to ream your cock down her throat, as your cock goes deeper you will hear her gag quicker and quicker the deeper you go. similar to the sonar effect.
i was with this dumb slut lastnight and she wasnt sure if she could deepthroat, so i did the sonar test on her!
by K Hurst April 28, 2005

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