Jackoff of all trades
A person who thinks they're a rockstar at everything, but they’re just a guy who tried to be all things and failed at all of them. They’re a mess with a smile.
'He said he could run a marathon, do a backflip, and write a poem. Now he’s limping, sore, and the poem was about his bad hair.'
'She said she could be a CEO, a model, and a magician. Now she’s a part-time office worker, a part-time cashier, and a part-time clown.'
'He told me he could play guitar, cook dinner, and win the lottery. Now he’s eating burnt toast, playing out of tune, and still waiting for the lottery.'