Top Definition
when a female pursues a relationship or intimate encounter with a younger male
"Mrs. Robinson was feeling a little mellish."
by Ryand June 02, 2006
a verb describing one of the most monumental cock block's ever in which a younger person gets a little too intoxicated and proceeds to throw up everywhere creating mass hysteria and in turn preventing any getting of ass
God! WTF? why did Ramsey have to go and mellish all over the couch while TJ was getting a BJ? What a supreme cock block.
by leblaxer19 May 14, 2006
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