Use 'tomfoolery' in casual or informal settings, not in serious or formal situations. The office party was full of tomfoolery and laughter.
Pro Tip 2/3
Negative Connotation
'Tomfoolery' often implies disapproval of the activities being described. Her parents had no patience for tomfoolery during family gatherings.
Pro Tip 3/3
Mild Disruption
Activities described as 'tomfoolery' are usually mildly disruptive or distracting. The teacher asked the students to settle down and stop their tomfoolery.