a suffix used in forming nouns, often derogatory, referring especially to occupation, habit, or association: gamester; songster; trickster.

Origin of -ster

Middle English; Old English -estre; cognate with Dutch -ster, Middle Low German -(e)ster
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British Dictionary definitions for -ster


suffix forming nouns

indicating a person who is engaged in a certain activityprankster; songster Compare -stress
indicating a person associated with or being something specifiedmobster; youngster

Word Origin for -ster

Old English -estre
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012