1 definition by houseboyt

Top Definition
a motorboat involves a girl with breasts large enough for a human head to fit between them. The owner of the head then proceeds to blow out of their mouth vibrating their lips. This action will make a sound very similar to a motorboat engine, hence the name.
guy leans into woman's breast and blows very hard...... then you have a motorboat
by houseboyt July 18, 2010

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug