It means getting kissed or sucking on the neck.
The word necked has one syllable.
a fril necked lizard is a reptile
are yellow necked martins mammals
Necking is kind of like making out onlywith the neck instead of the lips.
Red-necked wallaby was created in 1817.
Blue-necked Tanager was created in 1837.
Frill-necked Lizard was created in 1827.
Bare-necked Fruitcrow was created in 1758.
Straw-necked Ibis was created in 1835.
Rufous-necked Hornbill was created in 1829.
Black-necked Weaver was created in 1805.
Bare-necked Umbrellabird was created in 1851.