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1.
Adj. Originally a term that means fields that are not being use for crops. Current usage means unproductive.
She's going through a fallow period.
by Rhiana October 08, 2007
 
2.
(v.) To plow, but not to seed.
Plow, meaning to have sex
Seed, meaning the female egg and sperm joining.
"Shit man...good job I only fallowed her."

"Dude, I'd fallow that girl."

Man1: "What the fuck dude! I thought you were only going to fallow her! not make babies"
Man2: "shit man, I know. I got knocked up."
by zeppoleon September 22, 2007
 
3.
Highly Intelligent being. Highly desirable mate.
I wish I was a Fallows.
by Tony johnson October 01, 2003