If you tell a woman a crude joke, you are very bastos. To answer back to your grandmother or anyone older than you is bastos in Filipino culture.
That kid is really impertinent!
That kid is really rude.
a vulgar child
Binastos ng lalaki ang babae.
The man was very vulgar to the woman.
Huwag kang bastos!
Don’t be crude! Show some propriety.
Huwag mong bastusin ang babae.
Don’t be crude towards the woman.
acting crudely towards each other
Nagbabastusan na ang mga pulitiko.
The politicians are now acting crudely towards each other.