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When you place your testicles lightly on the surface of a glass of chocolate milk and someone else uses a straw to blow bubbles into the glass
"Hey billy why don't you give me a FRENCH TUG-BOAT this evening, after our chess club meeting!"
by nigga bitch fo life September 20, 2008
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2
When you give your nuts a generous coating of milk and put them in a female's (or male's) mouth

OR

When a female (or male) gargles milk and a guy puts his nuts in her mouth
Hey Frank, do you like it when Brett gives you the French tugboat?
by Jake n Bake 27 December 29, 2008
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