Birding Slang

So, i know "Gropper" means Grass Hopper Warbler. I know what "Twitching" & "Dipping" are but "Gropper" got me thinking about other slang terms that i am not aware of yet..........

I think "Sprawk" means Sparrowhawk but i may be wrong.

I even have picked up (as per a previous post) what "Vismigging" is.

So how many more, can anybody let me know?