Green’s Dictionary of Slang

to trick with flattery, to ‘sweet-talk’, thus n. sweedler.

1908		Jakcson Dly News (MS) 6 Dec. 11/2: ‘Sweedle’ is a new verb. If you are amn and [...] have a wife and she puts her arms around your neck and calls you a dear old bear [...] she is trying to sweedle you. Give her money.
1909		S.F. Examiner 2 May 69/2: The Feminine Art of ‘Sweedling.’ by a Confessed ‘Sweedler’ [...] Sweedling [means] to coax a father, a brother or a lover into letting her have her own way by a mixture of swindling and wheeling.
1914		Star Trib. (Minneapolis, MS) 30 Nov. 12/2: How did we manage to express ourselves before the verb ‘to sweedle’ became part of the English language?