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If you decide to eat big then you are planning on instead of having your usual breakfast having a large more dinner like meal so as to give yourself a good run at the day.

A large meal can be refereed to as a big eat.
Bimmy: I'll get up 8 or half 8 prob and eat big then head soon after, gonna be a long day.
Jimmy: Definitely, I have some of todays dinner lined up.
Bimmy: I'm diving into a pizza or something.
Jimmy: Solid.
by lampcamp April 27, 2010