As we've always suspected, the promise ring wearing Jonas was the king of heavy petting.
We were doing all that heavy petting and humping and kissing and he got me with that line, “Just let me put the head in.”
TSA: The traveling public is on edge over the introduction of screening devices and heavy petting by TSA agents.
stimulating sexual contact between two people just short of intercourse
In high school, teenagers experiment with heavy petting.
Very passionate kissing, fondling, etc, stopping short of the sex act proper (1940s+)