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1.
Something or someone who is inferior, bad, cheap, low-class, or even Red-neck.
Michelle wears a baja jacket when she goes to the market and flies a NASCAR flag on her car. She is low rent.
by J. Carter June 08, 2006
 
2.
Used to describe an action or area which is of poor socioeconomic value. Trailer trash, ghetto and houses with car parts, shopping carts are areas of LR.

Actions might be but not limited to using plastic grocery bags as handbags and claiming Twinkies as an ingredient in a desert will definitely constitute as an LR action.
Joseph: "Whats with the grocery bag Lynn"?
Lynn: "I use it as a hand bag so I don't get mugged in my neighborhood. I got some Twinkies to make my strawberry shortcake desert"
Joseph: " That's low rent"
by LaurelE May 11, 2009
 
3.
Bad or undesireable.
"That was pretty low rent of John to eat all of your pizza without asking"
by Topher Mathes July 11, 2003
 
4.
The shortened version of "low rental"
We were just minding our business, skating at Porter's the other day, then all of a sudden a swarm of filthy low rents came charging Seminary Ave.!!
by Bent Himself June 17, 2003