Used by Filipinos when hearing or seeing people do something inappropriate or not connected to their topic
Short for (memagawa) means doing something inappropriate, (memasabe) means saying something inappropriate
Mema and Pepa are German derived nicknames for grandmother and grandfatherrespectively. They are not Yiddish (bubbe would be Yiddish for grandmother) or Southern U.S. American. They are used in areas with German ancestry in the U.S. though.