be too big for one’s boots—(also: be too big for one’s shoes) be too proud and conceited:
- That showed … his arrogance in acting like a puffed up politician who is too big for his boots.
fill one’s boots—(UK coll.)
1. have or acquire as much of smth. as one wants:
- Come on everybody, fill your boots, the food is on the table.
2. score lots of goals:
- He would have filled his boots in European football; it’s a shame that such a player will end up with just one medal.