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A person that has agreed to go to an event, but every time they open their mouth there is an excuse as to why they are late and never end up making it.

The saying seems to have started in Santa Barbara during a bachelors party weekend, the longjaw mudsucker is typical from the area.
I just called Marin to see why he was late, but all I heard was excuses as to why he was late. I don't think he's going to make it, he is such a longjaw mudsucker.
by SpekTro April 05, 2015
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