misthank

verb2

1. •
   To thank or give credit to someone for something they did not do.

   • If only I hadn't gotten drunk and raced around lying and misthanking . — 1983
2. •
   (no longer used) To express one's discontent with someone's behavior.

   • I had (in Harbour) heav'd mine Anchor o're, And ev'n already set one foot a-shoar; When lo, the Dolphin, beating 'gainst the bank, 'Gan mine obliuion moodily mis-thank: — 1611