Top definition
Slang for 'suck my d***'. Used by students in school attempting to hide disrespect from teachers.
'Johnny, put your phone away!'
'Mister, summer day!'
by Mr Teacher Man April 14, 2010
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2
The state of being unaware of the day as a result of it being summer.
MOM- "get up do u know what day it is today?!?"
ME- "uhhh its summerday."
by nynick1 September 04, 2009
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