When one pukes into a stick mold, then freezes the mold, then, hours later, uses the frozen stick of puke to fuck another person.
Man, Janet and I got so drunk last night, I ended up shoving a Frozen Puke Fuck-Stick in her ass. The worst part was, after it melted down, her dog came and licked up the pile of melted shit-puke.
A particularly poetic way of telling someone to give you a blowjob. The "liplock" in this case refers to the manner in which the recipient of this term will wrap their lips around your "fuck stick", which is a fancy term for your penis.
The recipient of this term will be so impressed by your verbal prowess that they will not be offended. This allows you and your friends to snigger openly at this person's stupidity without fear of rebuttal.