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A sickness, usually overcoming you for one day.Common in girls.

flagamps can occur when your period is just ending, but you still have cramps. Your abdomen still not feeling well, you eat a small amount of food, But later, your cramps will go away. Seeing as you only ate a small amount during the beginning of the day,your cramps turn into hunger. You think its still cramps, so you continue not eating, only to make matters worse.
"god, I felt terrible last night...I think I had the Flagamps.."
by Mosi Modesty August 21, 2007
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