Adulting (v): to carry out one or more of the duties and responsibilities expected of fully developed individuals (paying off that credit card debt, settling beef without blasting social media, etc). Exclusively used by those who adult less than 50% of the time.
One who is legally an adult (18 years of age) but is still learning how to adult i.e. regularly make and eat quality food, keep living spaces clean, and do everything that your mom either had to nag you to do or just did for you.
Adultlings in college often seek the advice of full-grown adults about how to function in a responsible manner so they can fully transition into adult-hood. An adultling might say “how do I adult,” or “I suck at adulting.”
Adulting (v): to do grown up things and hold responsibilities such as, a 9-5 job, a mortgage/rent, a car payment, or anything else that makes one think of grown ups.
Used in a sentence: Jane is adulting quite well today as she is on time for work promptly at 8am and appears well groomed.