威張り腐る (いばりくさる) Japanese meaning | KotomoraMeanings
1
godan verb (-ru)
throw one's weight around; act high and mighty; be puffed up
Pejorative compound of 威張る (to be bossy) and 腐る (to rot), implying an obnoxious, overbearing attitude. Stronger and more contemptuous than 威張る alone.
Don't act so high and mighty.