As a contraction leggo
is (slang) contraction of let go to cease to hold generally used in the imperative.
As an adjective leggy is
(uk|us) having long legs; long-legged.
(slang) Contraction of let go. To cease to hold. Generally used in the imperative.
* 1949 , William Lindsay Gresham: Limbo Tower (page 87)
* 1966 , Richard Johns: Pagany (page 120) [http://books.google.com/books?lr=&q=%22leggo+mister%22]
- He stepped in, gripping the orderly by the front of his white jacket. "Hey, leggo me. You'll start hemorrhaging and they'll blame me."
* 2005 , Christine M McMahon: Choices Made: The Street Years
- Hey, leggo , mister! I want to stay up there in the sun! Jim picked up the kid and carried him.
- "Hey, leggo ," Nick said pushing Jamy back a little. "What are you doin' ?" "I just wanted to hug you."
(UK, US) Having long legs; long-legged.
(UK) Having attractive legs.
Taller or longer than usual.
- Fred preferred leggy blondes.
- Plants grow leggy if deprived of light.