These slang have a positive connotation.
Aathal (අාතල්) - Happy feeling, state of happiness.
Aathal Kedenawa (අාතල් කැෙඩනවා) is used to describe a situation which disturbs the status quo. Moda Aathal (මෝඩ ආතල්, ගොන් ආතල්) TBD.
Ela kiri (එළකිරි) - Literally 'Cow's Milk'. Figuratively, means...