What is Sem-dog?
1.
A half boner, or semi-erection where the penis is not yet completely erect, but not completely flacid.
Dude, that super hot chick gave me a hug and before I had any idea I was sporting a mean sem-dog.
Can I get a sem-dog for my Rem-Dog. (Said when you want your friend Remy to get some ass).
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Usually found at events where there is free stuff, and most likely ripping into some minority. He is the guy always in the fridge steali..
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A phrase made popular by Spongebob Squarepants. Used when excited, antsy, or trying to make an akward or unwanted situation less serious..