noun: spoken as one word, meaning "my baby's daddy." Heard frequently on "Judge Joe Brown," "Judge Mathis," and "The Jerry Springer Show." Used by illiterate people of all races and ethinicities, although most prevalent among blacks. A similar word set is "mybabymomma," meaning "my baby's momma," of course. Variations in pronunciation include "muhbebbidaddy" and "mabaybuhsdadduh."
Judge Joe Brown: So, Ms. Federline, who takes care of your children while you're out streetwalking?
britney: wail, they be either wit mah momma or over to they daddy's house, yer Honor.
JJB: Your mother and who?
britney: mybabydaddy. We broke up when he found out I was gonna give him another bastard child for him to not support.
JJB: Y'all are pitiful and I've heard enough!! Case Dismissed!