1654 R. Aylett Susanna i. 5 in It doth her husbands heart rejoyce, To hear her Lute outwarbled by her voice.
1872 R. Browning xxxii. 34 What sound out-warbles brook?
2001 (Nexis) 27 May 8 The four singers compete in a Mariah Carey soundalike competition to see who can outwarble the others.