What is "mayonaise"

"Mayonaise" is a song by The Smashing Pumpkins, first officially released on the 1993 breakthrough album Siamese Dream. It was written by Billy Corgan and James Iha and was recorded from December 1992 to March 1993 at Triclops Sound Studios. According to Corgan, the whistling sound ( feedback) heard in "Mayonaise" came from a cheap guitar he bought, which, whenever he stopped playing it, created the whistling sound. This sound was then incorporated into the song. Corgan apparently got the title for the song after he looked "in [his] refrigerator".

Despite having garnered considerable radio play and remaining a fan favorite, "Mayonaise" was never an officially released single. In 2012 it won a Rolling Stone readers poll for "The Best Smashing Pumpkins Songs" by "a significant margin".