stop something in its tracks
stop (someone or something) (dead) in its/(one's) tracks
To make someone or something stop or come to a complete halt immediately or very suddenly. Hearing the gunshot in the distance stopped us both dead in our tracks. Boy, Samantha could stop you in her tracks with her smile!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
stop something in its tracksor
stop something dead in its tracks
COMMON If someone or something stops a process or activity in its tracks or stops it dead in its tracks, they make it immediately stop continuing or developing. Francis felt he would like to stop this conversation in its tracks. These job losses could stop Britain's economic revival dead in its tracks.
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012