1. Present participle tense of the word "still," as opposed to the more common use of the word in reference to "still at" or "still being." Use of the word "stilling" replaces the need for the present tense of "to be" in the sentence.
2.. Passing and/or wasting time occupying a certain space or the attention of a specific object, person etc.
3.. Passing and/or wasting time performing an action or task that may not necessary negate the allotted time given to the person or task.