Definition
SIMULATED FLAMEOUT
A practice approach by a jet aircraft (normally military) at idle thrust to a runway. The approach may start at a runway (high key) and may continue on a relatively high and wide downwind leg with a continuous turn to final. It terminates in landing or low approach. The purpose of this approach is to simulate a flameout.
Source: FAA Pilot/Controller Glossary (verbatim from the Federal Aviation Regulations).