Playful or foolish behavior usually accompanied by stream of consciousness jokes and random quotes.
Whistle's "(Nothing Serious) Just Buggin'", A Tribe Called Quest's "Buggin' Out", De La Soul's "A Little Bit of Soap" and The Pharcyde's "Ya Mama" are a prime musical examples of what it is to be buggin'.
A compound word formed from "tell", "me" and "no" used as a method to quickly state, "I preemptively acknowledge that you understand the objective, concept and/or action I have just presented to be accepted as an undeniable fact."
PERSON 1: (posts an image of an exquisite horse to a cowboy's Facebook timeline with the caption "tellmeno".)
PERSON 2 (A cowboy): (inner thoughts) That's an exquisite horse.