1 definition by InfamousFloorHost

Top Definition
Similar to motorboating but breasts are replaced with ass and face is firmly pressed into softest part of the cheeks, tongue is fully extended and excessive salivation occurs.
If your partner lets you go Inboardin, it should be considered a priveledge and treated as such. At no time should one run aground(when the tongue passes the taint into the vaginal area.)it is considered unsanitary and rude.
by InfamousFloorHost October 29, 2012

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