in one's tracks

[in one's tracks] {adv. phr.}, {informal} 1. Just where one is atthe moment; abruptly; immediately.

The hunter's rifle cracked andthe rabbit dropped in his tracks.

Mary stopped dead in her tracks,turned around, and ran back home.

Syn.: ON THE SPOT(1), THEN ANDTHERE. 2. See: FOLLOW IN ONE'S FOOTSTEPS.