look up any word, like blumpkin:
 
1.
Friend who suddenly disappears, usually because of a new relationship.
We were tight until he met Lailia. Then he milk cartoned.
by trollope June 03, 2007
 
2.
Subject of a missing person advertisement on the side of a milk carton, implying "disappeared without a trace".
Teamster Jimmy Hoffa was milk cartoned by the mob, and his body has never been found.
by HiTechHiTouch July 15, 2013
 
3.
past tense of milk carton.
That guy gave me a hard time so I milk cartoned him.
by nick May 09, 2005