Mumps is now called M or cache but it was originally called Mumps.
See http://www.camta.net/aboutm.htm

; The following is a single line of code
beer    ; Randy M. Hayman (haymanr@icefog.alaska.edu)
        for i=99:-1:1 w !,i," bottle",$S(i=1:"",1:"s"),
        " of beer on the wall, ",i," bottle",$S(i=1:"",1:"s"),
        " of beer.",!,"Take one down, pass it around, ",
        i-1," bottle",$S(i=2:"",1:"s")," of beer on the wall.",!