Troglodyte, noun
Medium insult you would call someone that does things how a caveman would, like eating with their hands or using a dull knife to cut something.
Are you trying to cut that tomato with a dull knife? Sharpen it you fucking troglodyte!
Dink, adjective
A light insult you would call one of your friends or siblings/cousins were they to slip up while doing something simple like spreading butter on toast.
Well, would you look at that! You ripped the toast again, ya Dink.
To Suck Fuck, verb.
When you suck so bad at something that "Suck Ass" or "Suck Dick" aren't enough.
Bro, let me spread the butter, you Suck Fuck at that shit.