A universal word that a group of friends will use and create their own definition for. It will be understood among friends if used in the correct tone and context. Mostly used when a person wants to mask the real word where eavesdroppers would not understand but his/her friends will understand.
Omg, i wanna sligem her so bad, if only she'd let me.
Dude! Let's sligem after school, it's been forever since I've been high.
Yeah she can go suck a sligem, i hate her so much.