nonchalant
v.— «I didn’t hear an explosion, so I started the engine and prepared to move out. Just then I heard Big Voice anouncing “Alarm….Red….” Dang. Leadership recently cautioned us to stop nanchalanting rocket attacks and seek shelter, so I didn’t feel good about driving off.» —“Rocketman” by Oneguy MREater (Iraq) Mar. 8, 2005. (source: Double-Tongued Dictionary)