a sometime thing

a sometime thing

An activity that one participates or engages in infrequently, sporadically, or in a limited capacity. With two kids at home, my career in finance has had to take priority, with writing only being a sometime thing. Ever since the power plant shut down, work in this part of the country has become kind of a sometime thing.
See also: sometime, thing
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

something thing, a

Something occasional or transient, as in For most free-lance musicians, work is a sometime thing. This idiom gained currency in the title of a song by George Gershwin, "A Woman Is A Sometime Thing" (1935), introduced in the folk opera Porgy and Bess.
See also: something
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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