n. 25B6; noun
that is sheer humbug : HYPOCRISY, hypocritical talk, sanctimoniousness, posturing, cant, empty talk; insincerity, dishonesty, falseness, deceit, deception, fraud.
you see what a humbug I am? : HYPOCRITE, fraud, fake, plaster saint; charlatan, cheat, deceiver, dissembler; informal phoney; poetic/literary whited sepulchre.
25B6; verb Dave is easily humbugged : DECEIVE, trick, delude, mislead, fool, hoodwink, dupe, take in, beguile, bamboozle, gull; informal con, kid, have on, put one over on someone.