Dutch abbreviation for 'Leipe Shit Ouwe', which is an expression of astonishment or amazement.
"Check die kerel daar met z'n scapino jas"
by dromer November 13, 2007
Lying Sack of Shit - Someone who is not truthful and in general is worthless.
Don't believe a damn thing that L-SOS tells you.
by Shirley_Temple April 20, 2010
Low Speed Operation, a group of people that don't know what they're doing or are just doing it really slow.
Man, this drive-thru sucks, what an LSO!
by LSO9 March 23, 2011