• (p. pr. & vb. n.) of Bluster • (a.) Exhibiting noisy violence, as the wind; stormy; tumultuous. • (a.) Uttering noisy threats; noisy and swaggering; boisterous. Found on http://thinkexist.com/dictionary/meaning/blustering/
Blus'ter·ing adjective 1. Exhibiting noisy violence, as the wind; stormy; tumultuous. « A tempest and a blustering day. Shak. » 2. Uttering noisy threats; noisy and swaggering; boisterous. 'A blustering fellow.' L'Estrange. Found on http://www.encyclo.co.uk/webster/B/71