Sycophantly adv.

rare. [f. SYCOPHANT a. + -LY².] In the manner of a sycophant; sycophantically.

1672.  Penn, Spir. Truth Vind., 94. We deny not the use of Master, Father, Son, Servant, &c., when they are significantly, and not improperly and Sycophantly used.

1871.  Member for Paris, II. 13. Self-styled Democrats, who refuse homage to a king, but fawn sycophantly upon the mob.