in. to complain. : Paul is always grousing about something.
n. a woman; women considered sexually. : Who's the grouse I saw you with last night?
in. to neck; to pet and kiss. : They were grousing in the backseat the whole trip.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Word Origin & History
grouse (n.)
"bird," 1531, grows (pl., used collectively), of unknown origin, possibly from Latin or Welsh.
[grous] 
