clip
v.— «Afleet Alex, charging from the middle of the pack to second place, made his move for the lead when front-runner Scrappy T veered suddenly into his path. Their heels “clipped”—which is horse racing parlance for getting tangled up.» —“In The Balance” by Joe Henderson TBO.com (Tampa, Florida) Jan. 31, 2006. (source: Double-Tongued Dictionary)