"Psycho" is a song by British singer-songwriter Maisie Peters, released on 2 July 2021 through Gingerbread Man Records as the second single from her debut studio album You Signed Up for This.

The song has received praise for its "smarter" and light-hearted approach of the term "psycho"; this is in stark contrast to Ava Max's 2018 song "Sweet but Psycho" which attracted criticism from several mental health advocates for stigmatizing mental illnesses.

[1] Credits adapted from Tidal[2] ‡ Sales+streaming figures based on certification alone.