Denshi Jisho — Online Japanese dictionary

冷やかす ひやかす 1: to banter; to make fun of; to jeer at;
2: to cool; to refrigerate
Common word, Godan verb with su ending 

You can also

Look up kanji details for 冷やかす.

Try a Yahoo Jisho search for 冷やかす .
Try a Goo Jisho search for 冷やかす .
Try a Google search for 冷やかす .