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1.
pertaining to or A person born with a mental condition and therefore has to work a million times harder to be able to do simple things. On top of this, a letto will usually suffer a lot of ridicule from society because people fear what they do not understand.

Someone who provides a very needed service for the community and sleeps with everyone, even the guy that has no shot at getting laid and everyone knows it. She will give him a sympathy fuck either because someone asked her to or she just has to fuck everyone she knows. These are great people, and without them sex crimes would definitly increase. Thank you slut, where ever you are.
"Yea that girl is dtf for sure she's a letto."
"how letto of you"
by DaTruthhrtz March 29, 2009
 
2.
<Italian> Letto
<English> Bed
Il letto = The bed
by Italian_Speaker_1989 April 26, 2004
 
3.
Short for Stelleto shoes
Shs 5'5"... 5'9". Its the Letto.
by Zag May 16, 2004