What exactly does the expression : ''locking each other's lips'' mean ??

Embracing and locking each other's lips.... Does it mean having a french kiss(a long kiss with the tongues playing important role in the kiss) ?? or is it just a long ''non-stop'' kiss until you ''unlock' your lips again .. ?? Where is the preson referring to when using this expression ?? What does it exactly mean ??What exactly does the expression : ''locking each other's lips'' mean ??
sucking face!/kissing intimately!What exactly does the expression : ''locking each other's lips'' mean ??
It means rotating your face so your mouths open wide and you connect very tight. Not a peck on the lips. Want some practice?
They're kissing each other passionately, their lips zoomed onto each other like when a missile is locked on some target hehe.
I've never heard it exactlyl that way, but a ';lip-lock'; is a firm kiss, more than just a peck. It's not necessarily a french kiss. ';Unlocking'; your lips would be stopping kissing.

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