“Bugs” Siegel refers to FBI Director J. Edgar Hoover “in a most degrading and insulting manner.”
As long as we’re on the subject of Bugsy Siegel (d. 1947), fans of “Mob City” might consider perusing his FBI files, which are posted online in 32 often illegible, frequently censored sections. Notice his use of profanity. There is apparently a lot of this.