boom ting is also an act of cum shotting in someones face. this is a widely used word in north west london, united kingdom. its especially common among mandem who cum in the faces of the gyal dem.
its also something really good.
"easy gyal, let manz boomting in youre face, get me. ahh yeah, damn i love boomtinging in youre face"
"wow, her breasts are boom ting"