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1.
A group of dykes and gay men who think they're above everyone in their own circle.
See also "flake".
The sleers meet down the street when they have a problem with their straight families.
by Modge October 12, 2003
 
2.
Sleer, (origin, english)

The word sleer defines a slow, unstoppable, yet often regrettable foreward movement.
"The terd sleered from my anus."

"You look like the terd that sleered from my anus."

"I am going to sleer into your bedroom at night and leave smegma on your key board."
by Drezlin August 19, 2008