Call it quits

• Lower or resign
• Withdraw from office
• Send down
• Relinquish, as an office
• Resign, as a job
• Step down
• Relinquish office

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Demit \De*mit"\, n. The act of demitting; also, a letter, certificate, or the like, certifying that a person has (honorably) demitted, as from a Masonic lodge. [Webster 1913 Suppl.] ||

Wiktionary Word definitions in Wiktionary
n. 1 The act of demitting. 2 A document certifying that a person has (honourably) demitted, as from a Masonic lodge. vb. 1 (context transitive English) To let fall; to depress; to yield. 2 To relinquish an office, membership, authority, etc.; to resign, ...