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1.
1. to sizzer:
when two females spread their legs and put their vaginas together.

2. a lesbian sex act.
It's so hot when Christyn and Tashia start sizzering!
by TashiaandChristyn June 14, 2007
 
2.
What one may call a mildy retarded or severely stupid moron. Especially one specifically named Gregory Sevastianos.
Wow you are so god damn sizzers.
by I Own You April 14, 2004