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15.
when youre reall happy and/or excited, you yelp out in amazement by shouting "BOOM TING".

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.
" ohh snap, i just got a PS3. BOOM TING BLAD!"

"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"
by Snypa. January 23, 2006