heck·le 
(hĕkəl)
(hĕkəl)tr.v. heck·led, heck·ling, heck·les
1. To try to embarrass and annoy (someone speaking or performing in public) by questions, gibes, or objections; badger.
2. To comb (flax or hemp) with a hatchel.
[Middle English hekelen, to comb with a hatchel, from hekel, hatchel, from Middle Dutch; see keg- in the Appendix of Indo-European roots.]
heckler n.