Nablet
a person who thinks they’re a pro, but they’re more like a disaster in disguise
"He thinks he’s a pro gamer, but he’s a nablet. He can’t even aim straight."
"She signed up for the dance class thinking she was a pro, but she’s a nablet. She stepped on my foot and I didn’t even flinch."
"He tried to do a magic trick and it backfired. Classic nablet."