An adjective used to describe specifically a male that is a slut and a slag and is used amongst many teenagers as slang.
Brad is so sluggy!
When a male ejaculates on another individuals chest and then smears it with their penis.
Guy 1: Aye man you ever give a girl a sluggie?
Guy 2: No, but I sluggied your dad last night.
Someone who drops their fidget spinner
Ugh Simon is such a sluggy wag.