the green-eyed monster

US /ðə ˌɡriːn aɪd ˈmɑːn.stər/
UK /ðə ˌɡriːn aɪd ˈmɑːn.stər/
"the green-eyed monster" picture
1.

jealousy

:
When she saw her ex-boyfriend with someone new, the green-eyed monster reared its ugly head.
He tried to hide the green-eyed monster, but his anger was obvious.