blowing rings 

When someones is blowing smoke in the shape of a round rings

Me and jo were smokeing hookah and I was blowing rings non-stop

blowing rings by dream cacher nm May 15, 2015

blowing an o-ring 

When the lips of your anus, which form an "O", stretch to such an extent due to hours on the toilet, the "O" of your anal lips tear. Thus, you have blown your O-Ring, as well as lost your anal virginity.

"OH GOD! MY ANUS!"

"SUSTIN, ARE YOU BLOWING AN O-RING IN THERE?!?!?!"

*Blood and feces proceed to drip into toilet*

blowing an o-ring by Sustin Ramham March 23, 2015