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 14, 2011
Get the tu madre es una bicicleta porque personas montan su mug.