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Blowing a load of cum so fast it feels like a machine gun is shooting inside your mouth. Found scribbled under a table at Bondi Beach by a guy who used to be in the band. Also related to machine cunnilingus, which is just grosser.
"I tried machine gun fellatio and my mouth felt like a war zone.", @fellatofanatic
"My ex did machine gun fellatio and I got a nosebleed.", @nosebleed_night
"I gave my dog machine gun fellatio and he started howling.", @dogdad4life