Rustle up is a colloquial term used to describe the act of quickly preparing or finding something, especially food. There are several synonyms for rustle up that convey the same sense of urgency and efficiency. One such synonym is whip up, which refers to quickly creating a meal or dish. Another synonym is scrounge up, which suggests a resourceful effort to find something, such as spare change or a forgotten item. Other similar terms include cobble together, gather up, conjure, and pull together. These synonyms all invoke the idea of quickly and efficiently assembling or locating something necessary or desired.