When you have to masturbate really quickly because you don't know when your roommate is going to come home.
I got home early from school but couldn't remember Jim's schedule so I had to flashturbate before he got home.
by bonobos September 19, 2011
1 more definition
when you accidentally flashbang yourself playing call of duty
" I was playing MW3 online the other day and I tried to throw a flashbang through a window but it bounced back and I totally flashturbated myself hard
by MrPickleTickler December 29, 2011