To be in the act of any form of sexual activity be it flirting or other such things foolish adolescents get up to. If someone were to express their willingness to be kanoodling with someone else they would usally be talking about the person in question CONSTANTLY. An example of this would be:
'OMG! TOMtomTOMtomTOMtomTOMtom'

Any sexual activity above the waist, including (but not limited to)cuddling, kissing, breast fondling.

The gross behaviours of a new couple. The overtly lovey-dovey actions that sicken everyone not in that relationship.
Usually in the form of cuddling and un-nessecary giggling as a result of public tickling.

Any physical romantic contact between couples tht isnt necessarily kissing , or sex