"embracing and caressing a member of the opposite sex," 1825; see neck (v.). In architecture, "moldings near the capital of a column."
Entries linking to necking
neck v.
"to kiss, embrace, caress," 1825 (implied in necking) in northern England dialect, from neck (n.). Compare Middle English halsen "to embrace or caress affectionately, to fondle sexually," from hals (n.) "neck." Earlier, neck as a verb meant "to kill by a strike on the neck" (mid-15c.). Related: Necked.