haha, It means ash-tray on a motorcycle. It's even used in english :P. La usarias para compararla con algo aún mas inutil que ello.

hello .. =) "cenicero de moto" -------->(motorcycle ashtray) .. omg! it does not exist! ..if it existed it would be really useless...so this is the reason for this idiom! .. this idiom means -----------> u are useless - it's said to a person who is useless. ----- >u can use it when somebody is anable to do a simple thing .. -(it's also said to a person who is dealer -----> in neighborhood) <---------- not a common one! ok bai bai .. =) espero te sea util! .. besos ----------> MU

Es una frase utilizada para referirse a la inutilidad de algo. Se dice: "no si eso ES MAS INÚTIL QUE CENICERO EN MOTO.

Ohhh. Thanks for confirmation. XD You explanation explains better~~ Funny slang haha~

Hairo´s right! It´s a colloquial way we use in Argentina to say that someone is useless. There are so many ways to say it, but many of these are naughty words. I share one of these: "bocina de avión": "useless as plane´s horn". Hope you understand.