1. Blowing a rasperry on a vagina.
2. When a woman gives oral and then the man ejaculates just over her mouth, giving like a cappuchino moustache effect.
I heard Ryan likes to smuffle his mum.
Lauren doesn't like coffee but doesn't mind smuffle drip.
sticking your head between boobies and going 'brrrrrr'
Every good set of hooters deserves a good smuffle