When you have chlamydia and your girlfriend is giving you head, before you cum you spit in her mouth and then release all the sperm in the back of her throat creating a feeling like a slug climbing down her neck.
John:Yesterday I did the Slug Throat Fuck with Jessica,it is weird she enjoys it.
Brad:Dude,you need to cure that shitty STD!!
Someone who loves touching and risking getting rat lungworm from slugs. or loves messing around with slug trails and doesnt care about the risk
Offensive Scientist walks down the road "He sees some retarded girl rubbing her phone all over in a slug trail. as he can see shiny trails from the slugs
Offensive Scientist : Look at you. you fucking slug fucker. you want to be paralizized from the rat lungworm you stupid fucking slug fucker
Girl : OH YAS! I FUCKING LUV RAT LUNGWORM. OOOM. OOOM IM GONNA BECOME LIKE MY IDOL! SAM BALLARD!
When you cum on a girls ass or back and then slowly drag her across the floor on wherever you came, thus leaving a slug-like trail behind her.
Matt: "dude I came all over her ass last night.."
Lucas: "I hope you slugfucked her!"
Matt: "of course! I dragged her across the carpet and you could see the trail!"
A general state of chaos or disarray. Similar to clusterfuck.
Etymology:
The ancient British originally used the word 'fuckslug' in situations where the word 'fuckton' was too hyperbolic and generally just over the top. With a decline in the use of slugs as a mass unit, the seventeenth century saw a reversal of the word into 'slugfuck', and a further evolution of its meaning to the current usage.
Rob: Wait a second - is it ton, tonne, or tun? God, this whole system is a complete slugfuck.