Slag is the cheese that would grow between ones butt cheeks. If not removed, the slag begins to irritate the skin causing rashing and cists that smell like rotten fish.
I woke up late for work one day so i quickly left the house and made my way to work. As i was driving i could smell this horrible stench but i didnt know where it was coming from, so I continued my day like normal.. i arrived at work and everyone i walked past threw up, i was puzzled at first but then I realised that all of the slag from between my sweet cheeks had melted and ran down my leg onto the floor, i quickly ran out of the building and returned home to rid this foul monstrosity from my life
by Mr Mcdonald October 24, 2017
Get the Slagmug. by Arson Love's LeFox November 5, 2022
Get the slagmug. Slag basically means a very kind, wonderful caring person and is really nice to say to people as it will probably lighten their day <3
by httpsbo January 12, 2022
Get the Slagmug. 
Someone who wants attention of boys either by getting their friends to shout them out on snapchat saying "Lots of lads❤" and then playing around with every one of them choosing who to pull and who to go out with
"Libby your a slag"
by ISayFacts September 11, 2020
Get the Slagmug. by RonaldFootWorms September 20, 2023
Get the Slagmug. A girl who will fuck loads of boys and do literally anything to get attention. especially in class when they shout really loads so everyone will look at them.
Jess: OMG I GOT THAT ANSWER SIR(really load and winey)
John: oh my she is so annoying and load.
James: I know, she just can't help being an attention slag.
John: oh my she is so annoying and load.
James: I know, she just can't help being an attention slag.
by Samliv October 19, 2015
Get the Attention slagmug.