Same entry in Photius and other lexica; ultimately Phrynichus, Praeparatio sophistica 2.9 (see further, next note). The headword phrase (in which the particle ga/r needs to be supplied) is from comedy: Comica adespota fr. 576 Kock, now 554 K.-A.
[1] Theodoridis on Photius s.v. follows Reitzenstein in adding Phrynichus' trademark xrw=, i.e. use in conversation (or colloquial speech; cf. under alpha 4234.