Know why cattywampus was trending last week?
"the sun personified," mid-15c. (also in Old English), from Latin sol "the sun, sunlight," from PIE *s(e)wol-, variant of root *saewel- "the sun" (cf. Sanskrit suryah, Avestan hvar "sun, light, heavens;" Greek helios; Lithuanian saule; Old Church Slavonic slunice; Gothic sauil, Old English sol "sun," swegl "sky, heavens, the sun;" Welsh haul, Old Cornish heuul, Breton heol "sun;" Old Irish suil "eye").
The PIE element -*el- in the root originally was a suffix and had an alternative form -*en-, yielding *s(u)wen-, source of English sun (n.). French soleil (10c.) is from Vulgar Latin *soliculus, diminutive of sol; in Vulgar Latin diminutives had the full meaning of their principal words.
initialism from shit out of luck (though sometimes euphemised), 1917, World War I military slang. "Applicable to everything from death to being late for mess" [R. Lord, "Captain Boyd's Battery A.E.F."]
sol (sôl, sōl)
A colloidal dispersion of a solid in a liquid.
The area in New York City that is located south of Houston Street (1970s+)
2. Second-Order lambda-calculus.
3. Semantic Operating Language. Language for manipulating semantic networks for building cognitive models, particularly for natural language understanding. "Explorations in Cognition", D.A. Norman et al, W.H. Freeman 1974.
4. Shit Outta Luck.