Poorly organised, lacking the ability to organise.(adjective)
Not organised, not having any arrangement.(adjective)
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Use "unorganised" in a sentence
"But I insisted on having a look, and of course it was kind of unorganised but had an incredible profound beauty."
"Currently, at least 95% of agricultural produce reaches the end consumer through unorganised marketing channels like mandis, which many a times leads to price fluctuations, wastage and poor quality, according to MVS Efarm."
"They can now play China off against the US and a feeble and unorganised Europe, just as Nasser and Hafez al-Assad did with the Soviet Union."