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3.
When a chick is hot but couple of year younger than you, you put a “lay-by” on her so when she’s older, you can be in first!
wen ur mates lil sis is all that but a lil too young, u lay by her and be the first to get to her when shes old enough
by lil miss vixen April 21, 2005
22 11
 
1.
Used in some parts of Australia like Canberra. A hot girl that's too young for you and hence you have to figuratively put her on layby. Usually used as a qualifier so you don't sound like a pedophile.
Guy 1:"Check her out."
Guy 2: "Dude, are you sick? She's gotta be like 13."
Guy 1: "Okay then she's a layby." or "I'll put her on layby"

OR

"Check out the layby."
by K.C.D.L. May 26, 2004
50 27
 
2.
A place in the road where it is legal to pull over and stop for a short period of time. Also can be used as a place where two consenting adults may participate in sexual acts in a public area.
Driver: Oh look a lay-by... i'm feeling frisky!
Passenger: Pull over then, I'll sort that out!
Driver: But there is already a car there?
Passenger: Don't worry i'll put on a good show!
by emma86 November 15, 2006
18 2