Behaving like someone who avoids the behaviours expected of a responsible and mature adult. Sarcastically used by adults regarding behaviours (or lack thereof) demonstrating a lack of maturity by millennial's who sarcastically use adulting to validate or claim moments of maturation or adult like achievements
I had smashed avo for breakfast this morning, there goes my home loan deposit #millenialling
I had bills and assignments due this week but millenialling is setting me free