1. n. A brand of paint that glows under blacklight. Was popular in the 1960s. Sold in bright, fluorescent colours that have been known to cause partial blindness.
2. adj. A word for any obnoxiously bright colour.
'I saw this guy wearing the most insane pants yesterday...they were DayGlo green...'
'I expect he was on acid.'
by Rozeh April 08, 2009
Dayglo = Northern Scally Chic. The term ‘scally’ was coined originally in Liverpool to group together a certain type of person through their clothes, language and ideals. A dayglo is a southerner, often an ex-chav, who embraces the scally dress code specifically.
Your a dayglo........go away.
by Suncream June 24, 2005

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