in spanish it means 'your mom is a bicycle because people ride her!' its a great way to diss your friends with out them knowing what the hell your talking about.
your friend: hey your mom is so fat!!
you: oh yeah well 'tu madre es una bicicleta porque personas montan su!'
you: oh yeah well 'tu madre es una bicicleta porque personas montan su!'
by tu madre es tu mama June 15, 2011