(British) A very large penis able to blast fannies into the middle of next week.
I can barely walk after last night! The guy I picked up had a right fanny blaster on him!
by Honeybunny99 February 20, 2017
Get the fanny blaster mug.
A fanny blaster is an individual with the ability to blast their fanny; known to scientists as the phenomenon of ejactualating large amounts of carbon dioxide into the atmosphere, contributing to global warming considerably.

Also used metephorically to describe someone of a gasey nature, i.e talks a load of shite.
policeman: we have a situation here, can't breathe
emergency services: calm down, whats the assesement?
policeman: we've got us a fanny blaster!

"greg, you complete and utter fanny blaster"
by Luke webb August 11, 2006
Get the fanny blaster mug.