Top Definition
A female who is a secret lesbian. She may date, shack up with, and/or flirt with guys but deep down she has a strong passion for females. She is still in the closet or in this case the "lunchbox" She thinks your mom packs better stuff and wants a peek inside and possibly a taste.
"Kristen your boobs look really nice in that top" "Carol you're such a lunchbox lesbian! Stop trying to touch them"
by (untshorts September 10, 2011

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