Asmachta

In Jewish law, an Asmachta is a conditional commitment or promise that a person makes, but actually has no intention of keeping. The agreement is not considered binding, and the commitment is considered null and void.

Controversy exists as to whether various forms of gambling, including games of chance and lottery tickets, are considered to be an Asmachta.

An unrelated meaning of Asmachta is a Rabbinic prohibition or requirement that is hinted to in the Torah, but is not, in fact, one of the 613 Mitzvos.