1) Back talk 2) Backtalk 3) Bratty backtalk 4) Buncombe 5) Bunk 6) Bunkum 7) Drivel 8) Empty or foolish talk 9) Garbage 10) Hogwash 11) Humbug 12) Insolence 13) Insolent talk 14) Malarkey 15) Nonsense 16) Sass 17) Unacceptable behavior 18) Verbal abuse 1) Bullshit 2) Buncombe 3) Bunkum 4) Dog shit 5) Gas 6) Gobbledygook 7) Horseshit 8) Lip 9) Nonsense 10) Rot 11) Sass 12) Verbal abuse 
nonsense; empty talk
Guff is slang for to break wind, anally.
empty or foolish talk; nonsense. · insolent talk.