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1.
the film-like substance that forms on top of soups and gravy.
Ewwww, the gravy has blemis on it.

You're human blemis.
by lrb March 18, 2004
 
2.
The foam scum that forms when you put instant coffee in the microwave heated water. This can be avoided by put the sugar in first.
Having blemis on your coffee is yucky.
by Owl Hawk June 14, 2010
 
3.
Adjective describing someone who naturally goes to sleep late and wakes up late. This is officially called "delayed sleep-phase syndrome."
Harry got up around noon, telling his family, "I'm not lazy, I'm blemis."
by FreeClench November 26, 2008