A slanger is a big dick that hangs low.
Sidney: He had on grey sweats girl. I could see right through it!
Anna: Was it big?
Sidney:YASS GIRL YASS!!
Anna: OUUUU HE GOT THAT SLANGER?!
Sidney:mhmm
A large penis larger than usual
Aye mane sierra found out I had a slanger last night
"These muthafuckas look at me like I'm a slanger
Making threats to family dawg I'm in danger..."
-From "G-Code" by Geto Boys
Someone who's job it is to sell merchandise, food or a service.
Yeah, I'm slanger at Taco Bell. I be slanging tacos all day!
A slanger is a cominbined noun, slut + banger, referring to one who bangs sluts, like Lou Ferigno.
Lou is a slanger, and has many sluts.