1)An act done whilst in the doggy position. When the giving partner is about to cum, he pulls out and makes a noise like an aeroplane. Confused, the recieving partner turns around just in time to recieve a face full of cum.
2)Done at a sleep over or similar event. Whilst someone is asleep, other people come and jizz in their face/ on their pillow.
I stealth bombed your mum last night!
We were stealth bombing Suzy.
We stealth bombed Adam at the party!