WAHGAHCAH Share definition Flag Term used by a group delirious Irish birds (girls) to locate eachother in a crowded setting. ‘WAHGAHCAH’ is repeated aloud until the birds are reunited. Similar concept to the game ‘Marco polo’. Person 1: WAHGAHCAH Person 2: WAHGAHCAH *reunited* WAHGAHCAH by POC6.0 February 6, 2022 Get the WAHGAHCAH mug.