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it means laughing my nut sac off, primarily used by boys
"hahaha LMNSO,"
"what does that mean?"
" laughing my nuts sac off!"
LMNSO by JEFEN October 26, 2020
Related Words
lmnso LMSO lmno lmnop LMFSO Lanson lenso lmaso LMNBO lmnotptyv
the fastest part of the alphabet
lmnop:

Kindergartener: J, K, elemenopee, Q R, S,,,
lmnop by GrimacingTomato June 2, 2015
a very tall guy with a hot body but can also be shy
that tall dude over there is a lanson
Lanson by azngurlz December 31, 2010
A wild animal who is smart but hides it
lonson is smart but wild.
lonson by lonson May 11, 2018
Man: Why'd the chicken cross the road? To get to the other side!
Woman: Lmcso
Lmcso by Satan with a Perm May 3, 2010
Simple, it means Laugh My Nose Off👃🏽.
Lmno by bracefacebaby_3 November 15, 2019