Adjective
(literally) Having no maidens.
(rare) Uncharacteristic of a maiden; (by extension) vulgar, uncouth, unladylike.
Synonym: unmaidenly
(Internet slang) Single; lacking a girlfriend. [from 2022]
Hypernym: loverless
(Internet slang, by extension, derogatory) Generally rude, obnoxious, pathetic, or contemptible; incel-like. [from 2022]
maidenless behaviour