WDYD meaning in Messaging ?

Answer: What is What Do You Do? mean?

"What Do You Do with the Mad That You Feel?" is a song written and sung by PBS personality Fred Rogers in the PBS children's television program Mister Rogers' Neighborhood. Rogers recited the song in testimony before the United States Senate in 1969, early in the funding process of PBS, during an exchange with Senator John Pastore. Footage of the hearing was included in the 2018 documentary about Rogers, Won't You Be My Neighbor?

Rogers gave several stories for the origin of the song, but when he testified to the Senate, he said that the title and first line came from a question Rogers received from a concerned boy, who asked "What do you do with the mad that you feel when you feel so mad you could bite?"

The song first appeared on his program in 1968.

reference

Full Form	Category
What Did You Do??	Computing
What Do You Drink	General
What Do You Do??	Messaging