cheat on
Intermediate (B1)informal
To secretly do something bad that breaks the rules or hurts someone who trusts you — like kissing another person when you have a boyfriend or girlfriend, or copying answers on a test.
"She found out he had been cheating on her for almost a year before she confronted him."
Hear it in context
(LORE STREAM) not crafting well...
TommyVODS · 135:18
Never cheat on Joshua.
Trump speaks to seniors in The Villages, FL on economic agenda
The Hill · 157:13
They cheat on elections.
Saying the Words with Brandon Sanderson
Very Really Good · 28:00
cheat on a book report.
WE HID SIDEMEN IN CONTAINERS ACROSS A COUNTRY
Sidemen · 3:17
Did I just cheat on Talia?
Silicon Valley's Hottest Young Founder Right Now | Cluely, Roy Lee
EO · 8:51
Like what is cheat on everything?