Webmistress 

1. Female webmaster.
2. A female who programs, designs, and/or creates a web site.

The sorority's web site is not working properly; I will contact the webmistress of the problem.

Webmistress by Cryptic March 5, 2004

Webmistress 

A wife who loses her husband's attention and love to the more seductive Internet.

After Jack began spending more time on status updates and tweets, his wife realized she'd become a webmistress.

Webmistress by Mohit Hira February 8, 2010

webstresser 

Webstresser is a online tool used for DDoS and network infrastructure stress testing.
This type of tool can be used for legal & illegal purposes, it depends on the user not the service to decide this.

Webstresser could also be reffered to webstresser.org biggest online DDoS (stress test tool)

Gaming kid : Woah I think I just got DDoS'ed
Other kid : He must have used webstresser on your ip address!

Def 2

Hacker : I will hit your IP address offline using my webstresser

webstresser by Looooooooll June 25, 2017