Nip on (someone's or something's) heels informal verb phrase
To give ineffectual bites to someone's or something's heels.
I ran as fast as I could, but the dog kept nipping on my heels.
I felt something nipping on my heels during the night, and I absolutely freaked out
In terms of rank, score, skill, etc., to be extremely close behind someone or something.
Their team has nipped on the defending champions's heels this morning.
The team, currently nipping on rivals Manchester City's heels in the Premier League, are also competing in the Europa League.
To win only by a smaill amount; to win narrowly
To close the door
Two places are very close to each other.
At a close enough distance to plainly hear when someone is calling or shouting one
The verb "nip" should be conjugated according to its tense.
Something has too many defects, problems or flaws.
Your essay has more holes than Swiss cheese.