Birthday Brother

A male who shares the same birthday as you. You were born on the same day of the same year. Even though you are not true brothers, this is a significantly close bond
See also Birthday Sister

Brady: Happy Birthday James.
James: Happy Birthday to you too, Birthday Brother.

by Pablo2342 May 31, 2010

Birthday Sister

A female who shares the same birthday as you. You were born on the same day of the same year. You are not true siblings, but you share a significant bond
See Also Birthday Brother

Anna: Happy Birthday Robyn.
Robyn: Happy Birthday to you too, Birthday Sister

by Pablo2342 May 31, 2010