Quits

on equal terms by repayment or retaliation.
call it quits,

to end one’s activity, especially temporarily:
At 10 o’clock I decided to call it quits for the day.
to abandon an effort.

cry quits, to agree to end competition and consider both sides equal:
It became too dark to continue play and they decided to cry quits.
to stop, cease, or discontinue:
She quit what she was doing to help me paint the house.
to depart from; leave (a place or person):
They quit the city for the seashore every summer.
to give up or resign; let go; relinquish:
He quit his claim to the throne. She quit her job.
to release one’s hold of (something grasped).
to acquit or conduct (oneself).
to free or rid (oneself): to quit oneself of doubts.
to clear (a debt); repay.
to cease from doing something; stop.
to give up or resign one’s job or position:
He keeps threatening to quit.
to depart or leave.
to stop trying, struggling, or the like; accept or acknowledge defeat.
released from obligation, penalty, etc.; free, clear, or rid (usually followed by of):
quit of all further responsibilities.
any of various small tropical birds.
Contemporary Examples

Revenge of the Rock Nerds: TV on the Radio’s Long Road to ‘Seeds’ Marlow Stern December 2, 2014
Don’t Forget Gary Johnson! How the Libertarian Could Shake Up 2012 Michael Ames May 5, 2012
Why Palin Mania Won’t Die Matt Latimer October 14, 2009
Bruce and Kris Jenner Split Up, Lamar Odom Pleads Not Guilty to DUI Culture Team October 8, 2013
The Best of Fringe Factor: A Year in Review Caitlin Dickson December 28, 2013

Historical Examples

File No. 113 Emile Gaboriau
The Imaginary Invalid Molire
Essays, First Series Ralph Waldo Emerson
The Downfall Emile Zola
History of Friedrich II. of Prussia, Vol. XIII. (of XXI.) Thomas Carlyle

adjective (postpositive)
on an equal footing; even: now we are quits
call it quits, to agree to end a dispute, contest, etc, agreeing that honours are even
interjection
an exclamation indicating willingness to give up
verb quits, quitting quitted, (mainly US) quit
(transitive) to depart from; leave: he quitted the place hastily
to resign; give up (a job): he quitted his job today
(intransitive) (of a tenant) to give up occupancy of premises and leave them: they received notice to quit
to desist or cease from (something or doing something); break off: quit laughing
(transitive) to pay off (a debt); discharge or settle
(transitive) (archaic) to conduct or acquit (oneself); comport (oneself): he quits himself with great dignity
adjective
(usually predicative) foll by of. free (from); released (from): he was quit of all responsibility for their safety
adj.
adj.
v.
In addition to the idiom beginning with quit