Sooooo many!
When people say... 'I'm taking the flimsy nets down, 'because cats.' or 'I am taking my umbrella 'because weather!'
'Team work makes the dream work.'
People saying 'LOL' out loud. (Or OMG!)
Nom nom nom
I'm dead! (When someone find something hilarious.)
I hate the word BREAST/BREASTS too. Prefer boobs. Also hate vulva and vagina and penis! As a few others have said, the official words just irk me.
Irregardless (is that even a word?'
'A not insignificant amount.' (So a significant amount then?!)
People need to be more 'transparent.' (What? they need to turn into a window?)
Preggo
Bae
Slay
You do you. (What the FUCK does that mean?) 
It is what it is...
So I did a thing
I was today years old
Baby daddy
Fur baby
Life hack
At the end of the day
Adulting
It's just so 'chef's kiss.'
Low hanging fruit
The new normal
Think outside the box
Reach out
People saying I’M 40% IRISH, 25% ITALIAN, 25% NIGERIAN, AND 10% GERMAN.” No you are 100% American/British/whatever country you were born and raised in. (I'm looking at YOU Joe Biden, you are not Irish!!!!)
Win-win.
Is it hot enough for ya? (when it's over 85 F!)
'Can I pick your brain?' (Just ewwwwww.)