Refers to the sound of a vagina being penetrated. Similar to the sound of mac and cheese being stirred.
by Jgoosies December 15, 2015
Kim: How was the club last night?
Jessica: It was good, but then some doucher was mac n cheesin on me. I gave him your number.
Kim: bitch..
Jessica: It was good, but then some doucher was mac n cheesin on me. I gave him your number.
Kim: bitch..
by avidlol January 19, 2010