The time peroid that falls between yesterday and last week. Excelent for college students who don't have the capacity to remember what day it is.
Jess: Yell lost her phone lasterday.
by Jess's Drunk Ass October 01, 2007
Top Definition
A word used to describe an indefinite time in the past (e.g. last week, last month, last year)
Remember lasterday when we went to the beach?
by Brian May 10, 2003
My daugther doesn't grasp the concept of the word yesterday. Even after being corrected she insists on using her own created word for the day after today.

Meaning: The day or days before today, any day before the current day with no exact date in mind.
I did that at school lasterday.
by Real Check Bullies October 21, 2009
The last yesterday, in other words, the day before yesterday.
The teacher spoke to her class...
"I'm sorry I was ill yesterday but we'll continue with what we were talking about lasterday."
by Irby July 08, 2005
Last night, yesterday
Joel made me soup for dinner lasterday
by keywestgrl January 21, 2013
The day before yesterday
I did my homework lasterday
by magsies January 26, 2009
The day before yesterday.
Today is tuesday, which means Sunday was Lasterday.
by Teatime777 December 28, 2015
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