gagaga‧ga /ˈɡɑːɡɑː/ adjective [not before noun] informal 
1an insulting word used to describe someone who is confused because they are old: 
Sid keeps forgetting my name. I think he’s going a bit gaga.2having a strong but often temporary feeling of love for someone SYN infatuatedgaga about/over I can’t imagine why Susan is so gaga about him.
1an insulting word used to describe someone who is confused because they are old: Sid keeps forgetting my name. I think he’s going a bit gaga.2having a strong but often temporary feeling of love for someone SYN infatuatedgaga about/over I can’t imagine why Susan is so gaga about him.