Top Definition
1. sexonaboat is a term used to describe the action of engaging in sexual intercourse on a marine motor vehicle. It derives from the route of sex on a boat which means the same thing.

2. A proclaimation of great disgust
"THIS BOOK IS A PIECE OF SHEAAAAAT! SEXONABOAT!"

"Hey dude, sexonaboat."

"Dude sex." "Onaboat" "Thank you
by CoDyF1234321 January 18, 2010
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