The Brief: The see no evil monkey means that someone doesn't want to see something. It can also be an expression of excitement.

DEEP DIVE
The see no evil monkey, part of a three wise monkeysΒ emoji series ( πππ), means that someone doesn’t want to see something. It can also be an expression of excitement, or embarrassment.
Or it can be used for an emoji game of peek-a-boo:Β ππππππ…
I just filmed a CRAZY makeup game!!!!! ππ β¨ itβsβ¦β¦.. INTERESTING to say the least, haha! Iβm editing now and itβll be up after!
— NikkieTutorials (@NikkieTutorials) July 19, 2018
https://twitter.com/iamSteveOla/status/1019852711972474880
people who use this emoji π in the year of our lord 2018 make me genuinely, viscerally uncomfortable. get away from me. lose my number.
— ellie (@holy_schnitt) July 19, 2018