Look who just stepped in

Catchphrase of well-known UK rapper 'Morrisson'

This line can be heard in 'Shots Remix' and 'Buckingham Palace'

Morrisson: "Look who just stepped in MORRISSON!"

Alternatively:

Morrisson: "Look who just came in MORRISSON!"

look who's talking

something you say to call out a hypocrite in a conversation

I would never cheat with you
Oh look who's talking! I saw you bang Cornelius the other night

It's look who it is

Used when you see someone you know, and can also be used when referring to yourself.

Term coined by Twitch streamer and youtuber Simpleflips.

Outshout to Fimpleslips

Examples

Look who it is, it's look who it is.
Let me up, it's look who it is.

it's look who it is

whenever someone is approaching with a menacing aura you say its look who it is

ah hell na bro waloogi is approaching
"it's look who it is"

idiot who looks like shit

Patrick Stjerne

Descripe Patrick Stjerne: idiot who looks like shit :)