When you a suffering from a sexually transmitted disease and you have a green discharge seeping out of your genitalia. You then place your genitalia in the mouth of your partner. The act of inserting your dripping genitalia into your partners mouth is referred to as a slimer
" dude I was giving it to Tiffany last night, I totally thought I was about to cum, I ended up giving her a slimer instead. I didn't know I was still pussing, whoops"
by Thealiholmes February 15, 2017