A person with no intrinsic value or low social/interpersonal value and often lowers the value of anything they come across. The lowest of the low.
Like a slug in a gutter; something to be disregarded and ignored until it comes into your perception. Additionally, like a slug if you take it from the gutter (take this person from their lowly position) it’ll often leave you grimy and slimey (have negative effects on your life).
When describing a female it often means someone with low value due to their hypersexuality or past hypersexuality.
Never date a gutterslug, they have no loyalty because they’re broken. Our society is producing a lot of gutterslugs and it’s becoming harder to tell. Dating in this culture is likely to ruin your life.
Essentially, a promiscuous female of massive, shocking, unheard of proportions. Her breath consistently stinks of dick snot, a substance whose stench does not age well. That is one of many reasons why these beasts existence is so perplexing. Who allows them to defile their sacred anatomy? I personally enjoy referring to inferior prudish women as cumburping guttersluts since it undoubtedly causes them great confusion, a gaping mouth and an urge to slap you. These factors usually provide for phenomenal comedy.
Jose Contreras: How does the prostitute look across the street?
Bruce Lee: What the cumburping gutterslut? She looks like she started meth at age 7 and lost her teeth to a gang of horny Hell's Angels.