1) A little piece of poop with string tied to it so you can drag it along.
2) Someone who is being totally lame.
- Person A: Dude, check out my poop tugboat!
Person B: That thing is sick, dootang
-- Person A: That part was banana splits off the nuts crunchin
, but Mike was being such a poop tugboat.
Person B: Heck yeah, he being totally lame city.