A disease-like condition characterized by the intense need to listen to Underoath, specifically their newest album.
Taken from the title of Underoath's newest album Lost In The Sound Of Separation (LITSOS).
EX) "I can't go to school today, Mom, I have LITSOS"

translation) "I have to stay home and listen to Underoath ALL DAY."
by Tracey Berkowitz March 8, 2009
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To be so far gone alcohol no longer has any defining taste or affect on ones pallet. The moment in which one is so intoxicated that any physical surface becomes a place to rest and pissing their pants is inevitable.
Bro check out Brad. He pissed all over himself. Man that kid is fucking litso.”
by Bridge23 June 6, 2018
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Litso; Adjective; To be so far gone alcohol no longer has any defining taste or affect on ones pallet. The moment in which one is so intoxicated that any physical surface becomes a place to rest and pissing their pants is inevitable.
Bro check out Jack. He pissed all over himself. Man that kid is fucking litso.”
by Bridge23 June 2, 2018
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