A term used by young hipster gardeners to describe their frustration and angst at trying to maintain lush healthy grass. Fmlawn = fuck my lawn, a spin off from the more commonly used 'fml' is gaining rapid popularity among green thumbs who frequent various gardening forums and social networking websites.
Hey Dan, how's the garden going?
-No good bud, rain has delayed the laying of my new buffalo and has washed half my topsoil down the driveway
... Sucks to be you dude!
- Tell me about it, to make matter worse the neighbours cat keeps crapping in my yard. Fmlawn!