Wiktionary
has another think coming
vb. (en-third-person singularhave another think coming)
Usage examples of "has another think coming".
If the corrupt and Commie-Symp government of this city thinks it is going to fatten and batten on the blood and sweat and tears of the members of the United Sanitation Workers of America Local #337, it has another think coming.
Anybody who thinks they can waltz in and take you has another think coming.