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1.
A phrase said after you or one of your friends says some good news or also can be an affirmative phrase. Said in a deep monotone voice. Used only by kids in Los Gatos.
Friend 1: We're going to the movies after school
Friend 2: Yeah Baby!
by Rkz12345 June 05, 2014
 
2.
Get an extra large depends or adult undergarment. Guy and girl get in naked and do it missionary.
Guy and girl get in BIG diaper. Yell out Yeah Baby!