The Motorboat 

Vibrating ones lips over a females, hopefully large, chest.

The Motorboat cannot be explained, only enjoyed.

The Motorboat by Nick Beno July 12, 2006

Row the Motorboat 

To massage a woman's right breast clockwise and her left breast counterclockwise while one motorboats said woman

Stephanie slapped Bradford silly after he attempted to row the motorboat with her last night.

Row the Motorboat by Skoth December 9, 2008

Rowing the Motorboat 

A behavior involving

a. 1 male and 1 female
b. 1 male and 1 female

or
c. 1 male and 1 female.

This biological process occurs when a a person of the female sex is sitting on your lap and her boobs are pressed into your face. As you motorboat her boobs, your hands are thrust in a symmetrical fashion, extending from the center of your chest to the outside. This is similar to rowing a boat. As you are rowing the boat, the female is sitting on top of your lap, grinding on your privates.

Friend 1: damn bro did you hear about je'marcus
Friend 2: yeah I heard he broke his hands trying to row the fat chick from apartment 1-a
Friend 1:yeah he was rowing the motorboat

Rowing the Motorboat by tahck May 28, 2014

The Michigan Motorboat

It is a sexual act usually following after the act of fellatio. The man will then proceed to ejaculate into a crevice created by her wedging her breasts together. After the process of ejaculation he sticks his face into the breasts covered with his own semen and wish washles around.

Dude, she gave me head and I totally gave her the Michigan Motorboat.

No way dude.

Ya I can still taste it.

The Michigan Motorboat by The Michelan Man January 8, 2009

The tennessee motor boat 

When a tennessian man or woman participate in sexual intercourse that includes kool aid,pitbull,infant,vibrator,smoky mountains,and a full season of dukes of hazard on dvd and bluray,this usually takes place on sundays and with family gatherings,the man gets the dog to eat out and smother the baby with his poop-kool aid,as the baby eats it,the father shoves a vibrator in his left ear and violently thrusts in his direction howling like a wolf,this entire action sounds like a motor boat

Jimmy has never been the same since the tennessee motor boat.

The tennessee motor boat by Nebraskaboi2299 June 8, 2018

Motor boat across the river 

The act of motor boating boobs that are nonexistent or have a huge canyon in between them.

Dude she wants me to motorboat her boobs.
You mean motor boat across the river, she has no boobs.

Motor boat across the river by eSalazarv1 February 26, 2011