a leg up 1. (在攀登、上马或越障时给予的)帮助 The wall is very low, and your servant will give you a leg up. 这墙很低，你的仆人可以帮你一把让你翻越过去。 2. 鼓励；支持 The Government would at last give a leg up to the bill. 政府最终会支持这个议案。 3. 优势 Normally an incumbent president has a leg up on any challenger. 现任总统通常(在竞选中)比任何挑战者更具有优势。