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18.
Running a tug boat means to have 3 men no more and no less than that, tugging one out (masturbating) in a horizontal line side by side all facing one chick and blowing your load all over her.
"Man that chick is so hot."

"Yeah she looks like she needs a good tug boat ran on her."

"Well boys hope you are ready to tug one out, let's fuck up that pretty face of hers."
by DirtyDan March 01, 2012
 
1.
An un-attractive girl that attractive girls often surround themselves with.

The mutually beneficial arrangement allows the attractive girl to have menial tasks performed for her, and make herself look more beautiful by comparison. The unattractive companion(s) get to pick up the higher quality male scraps the attractive girl draws in.

Named after a long, graceful ocean liner surrounded by several ugly, short, tugboats as she enters harbor.
"You see that corker over there? I don't stand a chance with her, but I could probably nail one of her tugboats without too much effort"
by GP the Guineapig September 18, 2006
 
2.
a fat chick who drags you home despite your protests and subjects you to great fat sex all night
Tug Boat Annie brought her 319 pounds down on me in more ways than 3 that night, I was sexually exhausted by sunrise
by Jake March 07, 2004
 
3.
When one buries his/her face in the ass crack of another person and shakes their head back and forth while making a motor sound with their lips. Very close cousin to the Motor Boat.
Did you see her ass?? I'd Tug Boat that in a heartbeat!
by tugboatin November 16, 2012
 
4.
The act of passing gas in one area and unknowingly pulling the odor into another area via ones pants / skirt / under garments.
KT: "Jeesh Robbie, did you just fart in my office?"
RW: "No man, I farted outside and Tugboated into your office."
KT: "I commend you on your respect for my office."
by Karl Trollinger May 26, 2005
 
5.
While 2 guys are docking, a 3rd male or female uses one hand to jerk both off at the same time.
Bob: "Oh man I caught Donny and Chris docking last night. Instead of making it awkward, I just joined in and gave 'em the ol' tugboat."
(awkward silence)
Bill: "Thats weird, dude. I'm out."
by Mountain Ted July 07, 2011
 
6.
When a dog drags its ass on the ground to scratch itself.
Max the dog had a night full of tugboating after getting into the leftover chili.
by Shittyhorse September 28, 2011
 
7.
A nickname for a person that is fat or on the chubby side
Originated from Connor
Dude Connor is such a tugboat
by nicecamper45 June 02, 2013