Using a sock as a fake condom to come into. The opposite of a posh wank (which actually uses a condom).
My mum was doing my washing and found my blowsock from last night.
by Captain Blowsock June 19, 2007
A euphemism for something a male may fuck and then blow (ejaculate) into for example a sex toy, cup or pillow case..
Yasmine was unaware that Godfrey was just using her as his Blowsock!
by Always.. February 16, 2007