WordNet (r) 3.0 (2006):
hot up v 1: gain heat or get hot; "The room heated up quickly" [syn: heat, hot up, heat up] [ant: chill, cool, cool down] 2: make more intense; "Emotions were screwed up" [syn: heat up, hot up, screw up] 3: make more powerful; "he souped up the old cars" [syn: soup up, hop up, hot up]