Can't see where you're from OP. English isn't my native language, but I've never heard that term for formal wear before. 
Anyways, I actually don't own a single item that worksk formally. Went to a funeral a few days ago, during a last minute call(I was 10 the last time I was at a funeral, so I stupidly though you had to get invited), and had to go with jeans, black T-shirt and a black and white flannel shirt.
I felt really awful, like I wasn't taking it seriously.
I'm a metalhead though. Waist long hair, piercings and bad facial hair, so suits really doesn't look good on me.
Anyways, I actually don't own a single item that worksk formally. Went to a funeral a few days ago, during a last minute call(I was 10 the last time I was at a funeral, so I stupidly though you had to get invited), and had to go with jeans, black T-shirt and a black and white flannel shirt.
I felt really awful, like I wasn't taking it seriously.
I'm a metalhead though. Waist long hair, piercings and bad facial hair, so suits really doesn't look good on me.