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One of one's parents. (Often used in the plural to indicate both parents.) Which parental unit is coming to pick you up from school today, nerd? I'd love to come, but I need to check with the parental units if it's all right.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. parents. (see also rent(al)s.) Hey, units! I need to talk to you about something really important.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.