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1: a portmanteau of "lucid" and "placid", meaning calmly rational. A "lacid" point is one that usually ends an argument to the accord of all involved. A pejoritive connotation suggests a "know-it-all" mentality and a failure to act at crucial times. 2: a portmanteau of "lucid" and "acid", suggesting an LSD-induced clarity of thought.
1: College Professors and hipsters are lacid pieces of shit.

2: John Lennon was in a lacid state when he wrote "I am the Walrus".
by DJ Gargamel August 05, 2006
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