Answer: The word that fills in both blanks in the phrase “___ in one’s p___” is “ants” – as in the expression “ants in one’s pants.”

This comes from a New York Times Mini Crossword clue whose answer was explicitly given as ANTS , described as the word that fits both blanks in that phrase.

So, if you’re looking for what fills in both blanks in the phrase, the solution is: ANTS.

Information gathered from public forums or data available on the internet and portrayed here.