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13.
1. A male who must keep one member of a group afloat and with the program much like a tug boat has to keep a barge afloat and going in the correct direction.
2. A male who often must pull along less motivated participants within a circle of friends. They are often loud, humorous, and unrelenting in their passion for having fun and finding shananigans. A Tug boat will not stop untill all necessary participants are aboard with the evenings plans, regardless of how much his friends' girlfriends dig their heels in the mud and say NO!!!
1. Spunk needed to be dragged out sometimes, much like a barge, by the group tug boat.

2. Greg was such a tug boat regardless of how tired Matt, Lauren or Spunk were he always got them to go out and have fun!
by LaurCoogy March 12, 2007
 
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