knock the top off 

Phrase used to describe to describe masturbating shortly before having sex in order to prolong intercourse; most effective after a long dry spell.

It's been a while since I got any so I had to knock the top off before we did it.

knock the top off by Niki C January 12, 2006

Knock the top off 

To give oral sex to a male

knock the top off eg:
Hey Rolfus, how did you go with that waitress?
" She knocked the top off "

Knock the top off by Bigwoody76 April 28, 2010

Knock the top off it 

Aussie slang for masturbation

"I went on a date last night but the sheila didn't put out so I had to go game and knock the top off it"

Knock the top off it by Digger111 June 13, 2016

knock the top off of an anja

To masturbate while imaging an 20 year old Slovenian is about to have sexual intercourse with you

I'm gonna knock the top off of an Anja tonight after chatting on the forum

knock the top off of an anja by fish_n_smnb October 20, 2008