Wiktionary
defuser
n. One who, or that which, defuses.
Wikipedia
Defuser (comics)
The Defuser is a fictional character, a superhero created and originally portrayed by Austin, Texas police detective Jarrett Crippen on the reality television series Who Wants to Be a Superhero?. As a result of winning the show in its second season, his character is the subject of a Dark Horse Comics comic book written by Jeremy Barlow with art by Kajo Baldisimo and appeared in a Sci Fi Channel original movie entitled Lightning Strikes in 2009.
Usage examples of "defuser".
An accompanying intense looking young man was vaguely and anonymously introduced as an explosives expert, a defuser of bombs.