Answer: icantoo

AnswerCrossword Clue
ICANTOO

"Oh, yeah? Just watch me!"

ICANTOO

"Oh yeah? Watch me!"

ICANTOO

"Want me to prove it?"

ICANTOO
Playground retort
ICANTOO
Playground response to a challenge
ICANTOOReassuring retort
ICANTOOPlayground comeback
ICANTOOSchoolyard retort
ICANTOO"You're not the only one!"
ICANTOOConfident counterclaim
ICANTOOAffirmative retort
ICANTOODetermined response to low expectations
ICANTOOUnderdog's retort