Typing extremely loudly on a keyboard. usually when angry.
person typing on keyboard1:*thundertypes*
person2: Dude stop thundertyping, I'm trying to talk on skype
one who types obnoxiously loud or with great force
The thundertyper sitting behind me at the coffee shop needs to take out his anger on something other than his laptop.
When you're on skype/videocall and you can hear someone typing furiously on the other end
"mate i was chatting with Mike the other night and he was thundertyping so bad i could not hear what he was saying"